gh-15089: Prevent folder expansion on sync (gh-15197)

Co-authored-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>

.gitattributes

@@ -5,4 +5,4 @@
 *.patch linguist-language=C++
 *.d.ts linguist-language=TypeScript
 
-src/zen/tests/*.js linguist-language=Test
+src/zen/tests/** linguist-language=C++

.github/workflows/build.yml

@@ -26,6 +26,11 @@ on:
         required: true
         type: "boolean"
         default: false
+      disable-pgo:
+        description: "Build without PGO (skips the profile generation stages)"
+        required: false
+        type: "boolean"
+        default: false
   workflow_call:
     inputs:
       create_release:
@@ -48,6 +53,11 @@ on:
         required: true
         type: "boolean"
         default: false
+      disable-pgo:
+        description: "Build without PGO (skips the profile generation stages)"
+        required: false
+        type: "boolean"
+        default: false
 
 jobs:
   buildid:
@@ -73,6 +83,7 @@ jobs:
           echo "create_release: ${{ inputs.create_release }}"
           echo "update_version: ${{ inputs.update_version }}"
           echo "use sccache: ${{ inputs.use-sccache }}"
+          echo "disable-pgo: ${{ inputs.disable-pgo }}"
           echo "update_branch: ${{ inputs.update_branch }}"
           echo "GITHUB_REPOSITORY: ${{ github.repository }}"
           echo "GITHUB_REPOSITORY_OWNER: ${{ github.repository_owner }}"
@@ -102,14 +113,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download aws-cli
-        if: ${{ inputs.create_release && inputs.update_branch == 'release' }}
+        if: ${{ inputs.update_branch == 'release' }}
         run: |
           curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
           unzip awscliv2.zip
           sudo ./aws/install --update
 
       - name: Start self-hosted runner
-        if: ${{ inputs.create_release && inputs.update_branch == 'release' }}
+        if: ${{ inputs.update_branch == 'release' }}
         run: |
           echo "Starting self-hosted runner"
           echo "${{ secrets.SELF_HOSTED_RUNNER_START_SCRIPT }}" | base64 -d > start.sh
@@ -117,7 +128,7 @@ jobs:
           bash ./start.sh
 
       - name: Remove self-hosted runner script
-        if: always() && ${{ inputs.create_release && inputs.update_branch == 'release' }}
+        if: always() && ${{ inputs.update_branch == 'release' }}
         run: |
           echo "Removing self-hosted runner script"
           rm start.sh || true
@@ -280,12 +291,14 @@ jobs:
   windows-step-1:
     name: Windows build step 1 (PGO build)
     uses: ./.github/workflows/windows-release-build.yml
+    if: ${{ !inputs.disable-pgo }}
     needs: [build-data, buildid]
     permissions:
       contents: write
     secrets: inherit
     with:
       use-sccache: ${{ inputs.use-sccache }}
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       generate-pgo: true
       profile-data-path-archive: zen-windows-profile-data-and-jarlog.zip
@@ -295,11 +308,13 @@ jobs:
   windows-step-2:
     name: Windows build step 2 (Generate profile data)
     uses: ./.github/workflows/windows-profile-build.yml
+    if: ${{ !inputs.disable-pgo }}
     permissions:
       contents: write
     secrets: inherit
     needs: [windows-step-1, build-data]
     with:
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       profile-data-path-archive: zen.win64-pgo-stage-1.zip
       release-branch: ${{ inputs.update_branch }}
@@ -310,10 +325,14 @@ jobs:
     permissions:
       contents: write
     secrets: inherit
+    # windows-step-2 is skipped when PGO is disabled, so don't inherit its skip
+    if: ${{ !failure() && !cancelled() }}
     needs: [build-data, windows-step-2, start-self-host, buildid]
     with:
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       generate-pgo: false
+      disable-pgo: ${{ inputs.disable-pgo }}
       release-branch: ${{ inputs.update_branch }}
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
       use-sccache: ${{ inputs.use-sccache }}
@@ -326,20 +345,24 @@ jobs:
     secrets: inherit
     needs: [build-data, start-self-host, buildid]
     with:
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       release-branch: ${{ inputs.update_branch }}
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
       use-sccache: ${{ inputs.use-sccache }}
+      disable-pgo: ${{ inputs.disable-pgo }}
 
   mac-step-1:
     name: macOS build step 1 (PGO build)
     uses: ./.github/workflows/macos-release-build.yml
+    if: ${{ !inputs.disable-pgo }}
     needs: [build-data, buildid]
     permissions:
       contents: write
     secrets: inherit
     with:
       use-sccache: ${{ inputs.use-sccache }}
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       generate-pgo: true
       release-branch: ${{ inputs.update_branch }}
@@ -348,11 +371,13 @@ jobs:
   mac-step-2:
     name: macOS build step 2 (Generate profile data)
     uses: ./.github/workflows/macos-profile-build.yml
+    if: ${{ !inputs.disable-pgo }}
     permissions:
       contents: write
     secrets: inherit
     needs: [mac-step-1, build-data]
     with:
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       release-branch: ${{ inputs.update_branch }}
 
@@ -362,10 +387,14 @@ jobs:
     permissions:
       contents: write
     secrets: inherit
+    # mac-step-2 is skipped when PGO is disabled, so don't inherit its skip
+    if: ${{ !failure() && !cancelled() }}
     needs: [build-data, mac-step-2, start-self-host, buildid]
     with:
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       generate-pgo: false
+      disable-pgo: ${{ inputs.disable-pgo }}
       release-branch: ${{ inputs.update_branch }}
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
       use-sccache: ${{ inputs.use-sccache }}
@@ -378,6 +407,7 @@ jobs:
     secrets: inherit
     needs: [build-data, mac-step-3]
     with:
+      force-candidate: ${{ !inputs.create_release }}
       build-version: ${{ needs.build-data.outputs.version }}
       release-branch: ${{ inputs.update_branch }}
 
@@ -470,14 +500,14 @@ jobs:
     if: always()
     steps:
       - name: Download aws-cli
-        if: ${{ inputs.create_release && inputs.update_branch == 'release' }}
+        if: ${{ inputs.update_branch == 'release' }}
         run: |
           curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
           unzip awscliv2.zip
           sudo ./aws/install --update
 
       - name: Stop self-hosted runner
-        if: ${{ inputs.create_release && inputs.update_branch == 'release' }}
+        if: ${{ inputs.update_branch == 'release' }}
         run: |
           echo "Stopping self-hosted runner"
           echo "${{ secrets.SELF_HOSTED_RUNNER_STOP_SCRIPT }}" | base64 -d > stop.sh
@@ -485,13 +515,12 @@ jobs:
           bash ./stop.sh > /dev/null
 
       - name: Remove self-hosted runner script
-        if: always() && ${{ inputs.create_release && inputs.update_branch == 'release' }}
+        if: always() && ${{ inputs.update_branch == 'release' }}
         run: |
           echo "Removing self-hosted runner script"
           rm stop.sh || true
 
   release:
-    if: ${{ inputs.create_release || inputs.update_branch == 'twilight' }}
     permissions: write-all
     name: Release
     needs:
@@ -585,6 +614,7 @@ jobs:
 
       - name: Commit
         uses: stefanzweifel/git-auto-commit-action@v5
+        if: ${{ inputs.create_release || inputs.update_branch == 'twilight' }}
         with:
           commit_message: 🚀 Update update manifests
           commit_user_name: Zen Browser Robot
@@ -628,9 +658,22 @@ jobs:
         env:
           GITHUB_REPOSITORY: ${{ github.repository }}
 
+      - name: Upload signed MAR files to workflow artifacts
+        if: ${{ inputs.update_branch == 'release' && !inputs.create_release }}
+        uses: actions/upload-artifact@v4
+        with:
+          retention-days: 5
+          name: signed-mar-files
+          path: |
+            ./linux.mar/*
+            ./linux-aarch64.mar/*
+            ./.github/workflows/object/windows-x64-signed-x86_64/windows.mar
+            ./.github/workflows/object/windows-x64-signed-arm64/windows-arm64.mar
+            ./macos.mar/*
+
       - name: Release
         uses: softprops/action-gh-release@v2.2.2
-        if: ${{ inputs.update_branch == 'release' }}
+        if: ${{ inputs.update_branch == 'release' && inputs.create_release }}
         with:
           token: ${{ secrets.DEPLOY_KEY }}
           tag_name: ${{ needs.build-data.outputs.version }}

.github/workflows/linux-release-build.yml

@@ -20,6 +20,19 @@ on:
         required: true
         type: boolean
         default: false
+      disable-pgo:
+        description: "Build without PGO at all"
+        required: false
+        type: boolean
+        default: false
+      force-candidate:
+        description: "Force building against the Firefox release candidate"
+        required: false
+        type: boolean
+        default: false
+
+env:
+  SURFER_FORCE_CANDIDATE: ${{ inputs.force-candidate && '1' || '' }}
 
 jobs:
   build-linux:
@@ -105,6 +118,8 @@ jobs:
           SURFER_COMPAT: ${{ matrix.arch }}
           SURFER_CERT_PATCH_ISSUER: ${{ secrets.SURFER_CERT_PATCH_ISSUER }}
           SURFER_CERT_PATCH_NAME: ${{ secrets.SURFER_CERT_PATCH_NAME }}
+          SURFER_CERT_PATCH_NAME_PREV: ${{ secrets.SURFER_CERT_PATCH_NAME_PREV }}
+          SURFER_CERT_PATCH_ISSUER_PREV: ${{ secrets.SURFER_CERT_PATCH_ISSUER_PREV }}
         run: |
           . "$HOME/.cargo/env"
           npm run import
@@ -120,7 +135,7 @@ jobs:
           cd ..
 
       - name: Build (PGO stage 1 - generate)
-        if: ${{ matrix.arch == 'x86_64' }}
+        if: ${{ matrix.arch == 'x86_64' && !inputs.disable-pgo }}
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           ZEN_RELEASE_BRANCH: ${{ inputs.release-branch }}
@@ -137,7 +152,7 @@ jobs:
           bash .github/workflows/src/release-build.sh
 
       - name: Generate PGO profile data
-        if: ${{ matrix.arch == 'x86_64' }}
+        if: ${{ matrix.arch == 'x86_64' && !inputs.disable-pgo }}
         run: |
           set -x
           export DISPLAY=:2
@@ -155,6 +170,7 @@ jobs:
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           ZEN_RELEASE_BRANCH: ${{ inputs.release-branch }}
+          ZEN_GA_DISABLE_PGO: ${{ inputs.disable-pgo && '1' || '' }}
           ZEN_SAFEBROWSING_API_KEY: ${{ secrets.ZEN_SAFEBROWSING_API_KEY }}
           ZEN_MOZILLA_API_KEY: ${{ secrets.ZEN_MOZILLA_API_KEY }}
           ZEN_GOOGLE_LOCATION_SERVICE_API_KEY: ${{ secrets.ZEN_GOOGLE_LOCATION_SERVICE_API_KEY }}

.github/workflows/macos-profile-build.yml

@@ -14,6 +14,14 @@ on:
         description: "The branch to build"
         required: true
         type: string
+      force-candidate:
+        description: "Force building against the Firefox release candidate"
+        required: false
+        type: boolean
+        default: false
+
+env:
+  SURFER_FORCE_CANDIDATE: ${{ inputs.force-candidate && '1' || '' }}
 
 jobs:
   macos-profile-build:

.github/workflows/macos-release-build.yml

@@ -10,6 +10,11 @@ on:
         required: true
         type: boolean
         default: false
+      disable-pgo:
+        description: "Build without PGO at all"
+        required: false
+        type: boolean
+        default: false
       build-version:
         description: "The version to build"
         required: true
@@ -27,6 +32,14 @@ on:
         required: true
         type: boolean
         default: false
+      force-candidate:
+        description: "Force building against the Firefox release candidate"
+        required: false
+        type: boolean
+        default: false
+
+env:
+  SURFER_FORCE_CANDIDATE: ${{ inputs.force-candidate && '1' || '' }}
 
 jobs:
   mac-build:
@@ -122,6 +135,8 @@ jobs:
           SURFER_COMPAT: ${{ matrix.arch }}
           SURFER_CERT_PATCH_ISSUER: ${{ secrets.SURFER_CERT_PATCH_ISSUER }}
           SURFER_CERT_PATCH_NAME: ${{ secrets.SURFER_CERT_PATCH_NAME }}
+          SURFER_CERT_PATCH_NAME_PREV: ${{ secrets.SURFER_CERT_PATCH_NAME_PREV }}
+          SURFER_CERT_PATCH_ISSUER_PREV: ${{ secrets.SURFER_CERT_PATCH_ISSUER_PREV }}
           SURFER_PLATFORM: darwin
         run: |
           . "$HOME/.cargo/env"
@@ -138,13 +153,13 @@ jobs:
 
       - name: Download artifact (if use profdata)
         uses: actions/download-artifact@v4
-        if: ${{ !inputs.generate-pgo }}
+        if: ${{ !inputs.generate-pgo && !inputs.disable-pgo }}
         with:
           path: ~/artifact
           name: macos-profdata-${{ matrix.arch }}
 
       - name: Show artifact info
-        if: ${{ !inputs.generate-pgo }}
+        if: ${{ !inputs.generate-pgo && !inputs.disable-pgo }}
         run: |
           ls ~/artifact
           ls ~/artifact/en-US.log
@@ -164,6 +179,9 @@ jobs:
           if test ${{ inputs.generate-pgo }} = true; then
             export ZEN_GA_GENERATE_PROFILE=1
           fi
+          if test ${{ inputs.disable-pgo }} = true; then
+            export ZEN_GA_DISABLE_PGO=1
+          fi
           if [[ -n ${{ inputs.MOZ_BUILD_DATE }} ]];then
             export MOZ_BUILD_DATE=${{ inputs.MOZ_BUILD_DATE }}
           fi

.github/workflows/macos-universal-release-build.yml

@@ -11,6 +11,14 @@ on:
         description: "The branch to build"
         required: true
         type: string
+      force-candidate:
+        description: "Force building against the Firefox release candidate"
+        required: false
+        type: boolean
+        default: false
+
+env:
+  SURFER_FORCE_CANDIDATE: ${{ inputs.force-candidate && '1' || '' }}
 
 jobs:
   mac-build:

.github/workflows/windows-profile-build.yml

@@ -18,6 +18,14 @@ on:
         description: "The branch to build"
         required: true
         type: string
+      force-candidate:
+        description: "Force building against the Firefox release candidate"
+        required: false
+        type: boolean
+        default: false
+
+env:
+  SURFER_FORCE_CANDIDATE: ${{ inputs.force-candidate && '1' || '' }}
 
 jobs:
   windows-profile-build:

.github/workflows/windows-release-build.yml

@@ -10,6 +10,11 @@ on:
         required: true
         type: boolean
         default: false
+      disable-pgo:
+        description: "Build without PGO at all"
+        required: false
+        type: boolean
+        default: false
       build-version:
         description: "The version to build"
         required: true
@@ -30,6 +35,13 @@ on:
         required: true
         type: boolean
         default: false
+      force-candidate:
+        description: "Force building against the Firefox release candidate"
+        required: false
+        type: boolean
+        default: false
+env:
+  SURFER_FORCE_CANDIDATE: ${{ inputs.force-candidate && '1' || '' }}
 
 jobs:
   windows-build:
@@ -166,6 +178,8 @@ jobs:
           SURFER_COMPAT: ${{ matrix.arch }}
           SURFER_CERT_PATCH_ISSUER: ${{ secrets.SURFER_CERT_PATCH_ISSUER }}
           SURFER_CERT_PATCH_NAME: ${{ secrets.SURFER_CERT_PATCH_NAME }}
+          SURFER_CERT_PATCH_NAME_PREV: ${{ secrets.SURFER_CERT_PATCH_NAME_PREV }}
+          SURFER_CERT_PATCH_ISSUER_PREV: ${{ secrets.SURFER_CERT_PATCH_ISSUER_PREV }}
         run: |
           . "$HOME/.cargo/env"
           npm run import -- --verbose
@@ -213,13 +227,13 @@ jobs:
 
       - name: Download artifact (if use profdata)
         uses: actions/download-artifact@v4
-        if: ${{ !inputs.generate-pgo && matrix.arch == 'x86_64' }}
+        if: ${{ !inputs.generate-pgo && !inputs.disable-pgo && matrix.arch == 'x86_64' }}
         with:
           path: ~/artifact
           name: windows-profdata-${{ matrix.arch == 'aarch64' && 'arm64' || matrix.arch }}
 
       - name: Show artifact info
-        if: ${{ !inputs.generate-pgo && matrix.arch == 'x86_64' }}
+        if: ${{ !inputs.generate-pgo && !inputs.disable-pgo && matrix.arch == 'x86_64' }}
         run: |
           ls ~/artifact
           ls ~/artifact/en-US.log
@@ -244,6 +258,9 @@ jobs:
           if test ${{ inputs.generate-pgo }} = true; then
             export ZEN_GA_GENERATE_PROFILE=1
           fi
+          if test ${{ inputs.disable-pgo }} = true; then
+            export ZEN_GA_DISABLE_PGO=1
+          fi
           if [[ -n ${{ inputs.MOZ_BUILD_DATE }} ]];then
             export MOZ_BUILD_DATE=${{ inputs.MOZ_BUILD_DATE }}
           fi

README.md

@@ -34,8 +34,8 @@ Zen is a firefox-based browser with the aim of pushing your productivity to a ne
 
 ### Firefox Versions
 
-- [`Release`](https://zen-browser.app/download) - Is currently built using Firefox version `154.0`! 🚀
+- [`Release`](https://zen-browser.app/download) - Is currently built using Firefox version `154.0.1`!
-- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 154.0`!
+- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 155.0`!
 
 ### Contributing
 

build/firefox-cache/l10n-last-commit-hash

@@ -1 +1 @@
-1fb0703fa9723fd9c400ad60d18e64ee4f9bf125
+6b4abe0093721c1be89eb41b3fb060dd6336923d

build/windows/sign.ps1

@@ -3,8 +3,6 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 param(
-    [string][Parameter(Mandatory=$true)]$SignIdentity,
-    [string][Parameter(Mandatory=$true)]$SignIdentityIssuer,
     [string][Parameter(Mandatory=$true)]$GithubRunId
 )
 
@@ -24,11 +22,15 @@ mkdir windsign-temp -ErrorAction SilentlyContinue
 #    echo "Downloaded git objects repo to"
 #} -Verbose -ArgumentList $PWD -Debug
 
+$token = gh auth token
+
 $env:SURFER_MOZCONFIG_ONLY="1"
 $env:SURFER_SIGNING_MODE=""
 
-$env:SURFER_CERT_PATCH_ISSUER=$SignIdentityIssuer
+get-content "$PSScriptRoot/../.env" | foreach {
-$env:SURFER_CERT_PATCH_NAME=$SignIdentity
+    $name, $value = $_.split('=')
+    set-content env:\$name $value
+}
 
 Start-Job -Name "DownloadGitl10n" -ScriptBlock {
     param($PWD)
@@ -46,7 +48,6 @@ npm run build
 
 echo "Downloading artifacts info"
 $artifactsInfo=gh api repos/zen-browser/desktop/actions/runs/$GithubRunId/artifacts
-$token = gh auth token
 
 function New-TemporaryDirectory {
     $tmp = [System.IO.Path]::GetTempPath() # Not $env:TEMP, see https://stackoverflow.com/a/946017

locales/en-US/browser/browser/preferences/zen-preferences.ftl

@@ -64,6 +64,10 @@ zen-tabs-select-recently-used-on-close =
 zen-tabs-close-on-back-with-no-history =
     .label = Close tab and switch to its owner tab (or most recently used tab) when going back with no history
 
+zen-settings-workspaces-sync =
+    .label = Sync your sidebar across devices
+    .description = Keep your workspaces, pinned tabs and folders in sync on all your devices through your Mozilla account.
+
 zen-settings-workspaces-sync-unpinned-tabs =
     .label = Sync only pinned tabs in workspaces
 

locales/en-US/browser/browser/zen-general.ftl

@@ -164,5 +164,5 @@ zen-window-sync-migration-dialog-learn-more = Learn More
 zen-window-sync-migration-dialog-accept = Got It
 
 zen-appmenu-new-blank-window =
-    .label = New blank window
+    .label = New Blank Window
 

locales/en-US/browser/browser/zen-split-view.ftl

@@ -5,14 +5,14 @@
 tab-zen-split-tabs =
     .label =
         { $tabCount ->
-            [-1] Split out tab
+            [-1] Split Out Tab
-            [1] Add split view...
+            [1] Add Split View...
            *[other] Join { $tabCount } Tabs
         }
     .accesskey = S
 
 zen-split-link =
-    .label = Split link to new tab
+    .label = Split Link to New Tab
     .accesskey = S
 
 zen-split-view-modifier-header = Split View

locales/en-US/browser/browser/zen-welcome.ftl

@@ -5,29 +5,28 @@
 zen-welcome-title-line1 = Welcome to
 zen-welcome-title-line2 = a calmer internet
 
-zen-welcome-import-title = A Fresh Start, Same Bookmarks
+zen-welcome-back = Back
-zen-welcome-import-description-1 = Your bookmarks, history, and passwords are like a trail of breadcrumbs through the internet—don’t leave them behind!
+zen-welcome-skip = Skip for now
-zen-welcome-import-description-2 = Easily bring them over from another browser and pick up right where you left off.
-zen-welcome-import-button = Import now
 
-zen-welcome-set-default-browser = Set { -brand-short-name } as your default browser
+zen-welcome-import-title = Bring your stuff along.
-zen-welcome-dont-set-default-browser = DON’T set { -brand-short-name } as your default browser
+zen-welcome-import-description = Import your bookmarks, history and passwords from another browser and pick up right where you left off.
+zen-welcome-import-yes = <strong>YES</strong>, import from another browser.
+zen-welcome-import-no = <strong>NO</strong>, start fresh.
 
-zen-welcome-initial-essentials-title = Your Key Tabs, Always Within Reach
+zen-welcome-default-browser-title = Make { -brand-short-name } your default?
-zen-welcome-initial-essentials-description-1 = Keep your most important tabs easily accessible and always at hand, no matter how many you open.
+zen-welcome-default-browser-description = Links from other apps will open in { -brand-short-name }. You can always change this later.
-zen-welcome-initial-essentials-description-2 = Essential tabs are always visible, no matter what workspace you are in.
+zen-welcome-set-default-browser = <strong>YES</strong>, make { -brand-short-name } default.
+zen-welcome-dont-set-default-browser = <strong>NO</strong>, still exploring my options.
 
-zen-welcome-workspace-colors-title = Your Workspaces, Your Colors
+zen-welcome-default-search-title = Pick your search engine.
-zen-welcome-workspace-colors-description = Personalize your browser by giving each workspace its own unique color identity.
-
-zen-welcome-start-browsing-title = All set?<br/>
-    Let’s get rolling!
-zen-welcome-start-browsing-description-1 = You’re all set up and ready to go. Click the button below to start browsing with { -brand-short-name }.
-zen-welcome-start-browsing = Dive in!
-
-zen-welcome-default-search-title = Your Default Search Engine
 zen-welcome-default-search-description = Choose your default search engine. You can always change it later!
 
-zen-welcome-skip-button = Skip
+zen-welcome-essentials-title = Choose the apps you use most.
+zen-welcome-essentials-description = Select your favorite apps to keep them handy in your sidebar.
 
-zen-welcome-finished = Your Zen has been set up correctly!
+zen-welcome-workspace-colors-title = Your space, your colors.
+zen-welcome-workspace-colors-description = Personalize your browser by giving each space its own unique color identity.
+
+zen-welcome-start-browsing-title = All set? Let’s get rolling!
+zen-welcome-start-browsing-description-1 = You’re all set up and ready to go. Click the button below to start browsing with { -brand-short-name }.
+zen-welcome-start-browsing = Dive in!

locales/en-US/browser/browser/zen-workspaces.ftl

@@ -86,6 +86,8 @@ zen-workspace-default-profile = Default
 
 zen-workspaces-delete-workspace-title = Delete Space?
 zen-workspaces-delete-workspace-body = Are you sure you want to delete { $name }? This action cannot be undone.
+zen-workspaces-remote-delete-title = Delete Synced Space?
+zen-workspaces-remote-delete-body = { $name } was deleted on another device. Delete it here too? Keeping it will restore it on your other devices.
 
 # Note that the html tag MUST not be changed or removed, as it is used to better
 # display the shortcut in the toast notification.

package-lock.json

@@ -11,7 +11,7 @@
       "devDependencies": {
         "@babel/preset-typescript": "^7.27.0",
         "@zen-browser/prettier": "^3.9.3",
-        "@zen-browser/surfer": "^1.14.7",
+        "@zen-browser/surfer": "^1.14.9",
         "formal-git": "^1.2.9",
         "globals": "^16.3.0",
         "husky": "^9.1.7",
@@ -860,9 +860,9 @@
       }
     },
     "node_modules/@zen-browser/surfer": {
-      "version": "1.14.7",
+      "version": "1.14.9",
-      "resolved": "https://registry.npmjs.org/@zen-browser/surfer/-/surfer-1.14.7.tgz",
+      "resolved": "https://registry.npmjs.org/@zen-browser/surfer/-/surfer-1.14.9.tgz",
-      "integrity": "sha512-Ui2Chqvr4/+FmHM54eKOv7cQu8DRAK/uCX9o1GNi81hszxo/RSQwaw71eNW43Qcj7giK4U4x0IdCMht98iQ0rA==",
+      "integrity": "sha512-XbMzG4GHSRoGzKR/DkpyywcbTYemieDRD1A6qgJ8CaVDixenj/uzMhp6HXAUksRTeh1u9j3lzNcVrI99axcZLw==",
       "dev": true,
       "license": "MPL-2.0",
       "dependencies": {

package.json

@@ -49,7 +49,7 @@
   "devDependencies": {
     "@babel/preset-typescript": "^7.27.0",
     "@zen-browser/prettier": "^3.9.3",
-    "@zen-browser/surfer": "^1.14.7",
+    "@zen-browser/surfer": "^1.14.9",
     "formal-git": "^1.2.9",
     "globals": "^16.3.0",
     "husky": "^9.1.7",

prefs/firefox/browser.yaml

@@ -95,6 +95,9 @@
 - name: browser.search.widget.new
   value: true
 
+- name: layout.css.corner-shape.enabled
+  value: true
+
 # Disabled from https://searchfox.org/firefox-main/rev/d6bfff43852356ca98af848b4705d37f8d41856f/modules/libpref/init/StaticPrefList.yaml#2008
 # Only enabled for windows, doesn't really fit inside Zen.
 - name: browser.startup.preXulSkeletonUI

prefs/zen/sync.yaml

@@ -10,3 +10,6 @@
   value: false
   locked: true
   condition: "!@IS_TWILIGHT@"
+
+- name: zen.spaces-sync.debug
+  value: false

requirements.txt

@@ -8,4 +8,4 @@ packaging==24.2
 pathspec==0.12.1
 platformdirs==4.3.6
 pycodestyle==2.12.1
-requests==2.33.0
+requests==2.34.2

src/-prettierignore.patch

@@ -1,8 +1,8 @@
 diff --git a/.prettierignore b/.prettierignore
-index 949896ff064ae0b54b6a657ea074bc88e12820f7..5249f420972667bece4d85fe8d35073afaebeb8a 100644
+index bd8ab46ff7175f5039b69b04c1afe53ab8efe746..7ae12a1ff3724e99aeec2e93518640a2fa9611e6 100644
 --- a/.prettierignore
 +++ b/.prettierignore
-@@ -1803,3 +1803,12 @@ tools/ts/test/baselines/
+@@ -1807,3 +1807,12 @@ tools/ts/test/baselines/
  try_task_config.json
  xpcom/idl-parser/xpidl/fixtures/xpctest.d.json
  **/package-lock.json
@@ -12,6 +12,6 @@ index 949896ff064ae0b54b6a657ea074bc88e12820f7..5249f420972667bece4d85fe8d35073a
 +*.min.js
 +*.min.mjs
 +*.inc
-+*/mochitests/*
++**/mochitests/**
 +*.svg
 +

src/-stylelintrc-js.patch

@@ -1,5 +1,5 @@
 diff --git a/.stylelintrc.js b/.stylelintrc.js
-index b484bf6600a7e1b8ad2aed8c8b7fe5e84cc3d023..f89712e2c13dfa0bcb48e55cd3872c67f5c98dad 100644
+index b5f8245fa04ffb8fc82240261d63f893f4629f19..1b6ead24adbe69fcb5aeb95cfd3e7fa9662d89d8 100644
 --- a/.stylelintrc.js
 +++ b/.stylelintrc.js
 @@ -67,7 +67,7 @@ module.exports = {
@@ -11,10 +11,10 @@ index b484bf6600a7e1b8ad2aed8c8b7fe5e84cc3d023..f89712e2c13dfa0bcb48e55cd3872c67
        {
          ignore: ["blockless-at-rules"],
        },
-@@ -280,7 +280,7 @@ module.exports = {
+@@ -281,7 +281,7 @@ module.exports = {
-     "media-query-no-invalid": null,
      "stylelint-plugin-mozilla/media-query-no-invalid": true,
      "stylelint-plugin-mozilla/no-base-design-tokens": true,
+     "stylelint-plugin-mozilla/no-has-selector": true,
 -    "stylelint-plugin-mozilla/use-design-tokens": true,
 +    "stylelint-plugin-mozilla/use-design-tokens": false,
    },

src/browser/base/content/navigator-toolbox-inc-xhtml.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/navigator-toolbox.inc.xhtml b/browser/base/content/navigator-toolbox.inc.xhtml
-index dd2f391096968564086911c532f696dc7ffb8ae1..3de617bf4fb7fa35f7d4d7b618e4673b72b953ee 100644
+index dd2f391096968564086911c532f696dc7ffb8ae1..c968e5f0ebb5f0151fb124bafe10d8d5361e060f 100644
 --- a/browser/base/content/navigator-toolbox.inc.xhtml
 +++ b/browser/base/content/navigator-toolbox.inc.xhtml
 @@ -2,7 +2,7 @@
@@ -19,7 +19,7 @@ index dd2f391096968564086911c532f696dc7ffb8ae1..3de617bf4fb7fa35f7d4d7b618e4673b
    </toolbar>
  
 +<hbox id="titlebar">
-+  <html:div id="zen-toolbar-background" class="zen-toolbar-background zen-browser-generic-background">
++  <html:div id="zen-toolbar-background" class="zen-toolbar-background zen-squircle-before zen-squircle-after zen-browser-generic-background">
 +    <html:div class="zen-browser-grain" />
 +  </html:div>
 +  <box id="zen-overflow-extensions-list" skipintoolbarset="true" contextmenu="toolbar-context-menu" />

src/browser/base/content/zen-panels/site-data.inc

@@ -15,19 +15,23 @@
                 mainview-with-header="true">
       <hbox id="zen-site-data-header">
         <toolbarbutton id="zen-site-data-header-share"
+                        class="zen-squircle-before"
                         data-l10n-id="zen-site-data-header-share"
                         flex="1"
                         closemenu="none" />
         <toolbarbutton id="zen-site-data-header-reader-mode"
+                        class="zen-squircle-before"
                         data-l10n-id="zen-site-data-header-reader-mode"
                         command="View:ReaderView"
                         tooltip="dynamic-shortcut-tooltip"
                         flex="1" />
         <toolbarbutton id="zen-site-data-header-screenshot"
+                        class="zen-squircle-before"
                         data-l10n-id="zen-site-data-header-screenshot"
                         command="Browser:Screenshot"
                         flex="1" />
         <toolbarbutton id="zen-site-data-header-bookmark"
+                        class="zen-squircle-before"
                         data-l10n-id="zen-site-data-header-bookmark"
                         command="Browser:AddBookmarkAs"
                         flex="1" />

src/browser/base/content/zen-panels/theme-picker.inc

@@ -14,14 +14,14 @@
     <panelview id="PanelUI-zen-gradient-generator-view" class="PanelUI-subView zen-theme-picker" role="document" mainview-with-header="true" has-custom-header="true">
       <hbox class="zen-theme-picker-gradient">
         <hbox id="PanelUI-zen-gradient-generator-scheme">
-          <button id="PanelUI-zen-gradient-generator-scheme-auto" class="subviewbutton"/>
+          <button id="PanelUI-zen-gradient-generator-scheme-auto" class="no-squircles subviewbutton"/>
-          <button id="PanelUI-zen-gradient-generator-scheme-light" class="subviewbutton"/>
+          <button id="PanelUI-zen-gradient-generator-scheme-light" class="no-squircles subviewbutton"/>
-          <button id="PanelUI-zen-gradient-generator-scheme-dark" class="subviewbutton"/> 
+          <button id="PanelUI-zen-gradient-generator-scheme-dark" class="no-squircles subviewbutton"/> 
         </hbox>
         <hbox id="PanelUI-zen-gradient-generator-color-actions">
-          <button id="PanelUI-zen-gradient-generator-color-add" class="subviewbutton" />
+          <button id="PanelUI-zen-gradient-generator-color-add" class="no-squircles subviewbutton" />
-          <button id="PanelUI-zen-gradient-generator-color-remove" class="subviewbutton" />
+          <button id="PanelUI-zen-gradient-generator-color-remove" class="no-squircles subviewbutton" />
-          <button id="PanelUI-zen-gradient-generator-color-toggle-algo" class="subviewbutton" />
+          <button id="PanelUI-zen-gradient-generator-color-toggle-algo" class="no-squircles subviewbutton" />
         </hbox>
         <label data-l10n-id="zen-panel-ui-gradient-click-to-add" id="PanelUI-zen-gradient-generator-color-click-to-add"></label>
       </hbox>
@@ -29,82 +29,82 @@
         <toolbarbutton id="PanelUI-zen-gradient-generator-color-page-left" class="toolbarbutton-1" disabled="true" />
         <hbox id="PanelUI-zen-gradient-generator-color-pages">
           <hbox>
-            <box data-lightness="90" data-algo="float" data-num-dots="1" data-position="240,240" style="background: #f4efdf;"></box>
+            <box class="no-squircles" data-lightness="90" data-algo="float" data-num-dots="1" data-position="240,240" style="background: #f4efdf;"></box>
-            <box data-lightness="80" data-algo="float" data-num-dots="1" data-position="233,157" style="background: #f0b8cd;"></box>
+            <box class="no-squircles" data-lightness="80" data-algo="float" data-num-dots="1" data-position="233,157" style="background: #f0b8cd;"></box>
-            <box data-lightness="80" data-algo="float" data-num-dots="1" data-position="236,111" style="background: #e9c3e3;"></box>
+            <box class="no-squircles" data-lightness="80" data-algo="float" data-num-dots="1" data-position="236,111" style="background: #e9c3e3;"></box>
-            <box data-lightness="70" data-algo="float" data-num-dots="1" data-position="234,173" style="background: #da7682;"></box>
+            <box class="no-squircles" data-lightness="70" data-algo="float" data-num-dots="1" data-position="234,173" style="background: #da7682;"></box>
-            <box data-lightness="70" data-algo="float" data-num-dots="1" data-position="220,187" style="background: #eb8570;"></box>
+            <box class="no-squircles" data-lightness="70" data-algo="float" data-num-dots="1" data-position="220,187" style="background: #eb8570;"></box>
-            <box data-lightness="60" data-algo="float" data-num-dots="1" data-position="225,237" style="background: #dcce7f;"></box>
+            <box class="no-squircles" data-lightness="60" data-algo="float" data-num-dots="1" data-position="225,237" style="background: #dcce7f;"></box>
-            <box data-lightness="60" data-algo="float" data-num-dots="1" data-position="147,195" style="background: #5becad;"></box>
+            <box class="no-squircles" data-lightness="60" data-algo="float" data-num-dots="1" data-position="147,195" style="background: #5becad;"></box>
-            <box data-lightness="50" data-algo="float" data-num-dots="1" data-position="81,84" style="background: #919bb5;"></box>
+            <box class="no-squircles" data-lightness="50" data-algo="float" data-num-dots="1" data-position="81,84" style="background: #919bb5;"></box>
           </hbox>
           <hbox>
-            <box data-lightness="90" data-algo="analogous" data-num-dots="3" data-position="240,240"
+            <box class="no-squircles" data-lightness="90" data-algo="analogous" data-num-dots="3" data-position="240,240"
                 style="--c1: rgb(245, 237, 214); --c2: rgb(221, 243, 216); --c3: rgb(243, 216, 225);" />
-            <box data-lightness="85" data-algo="analogous" data-num-dots="3" data-position="233,157"
+            <box class="no-squircles" data-lightness="85" data-algo="analogous" data-num-dots="3" data-position="233,157"
                 style="--c1: rgb(243, 190, 222); --c2: rgb(247, 222, 186); --c3: rgb(223, 195, 238);" />
-            <box data-lightness="80" data-algo="analogous" data-num-dots="3" data-position="236,111"
+            <box class="no-squircles" data-lightness="80" data-algo="analogous" data-num-dots="3" data-position="236,111"
                 style="--c1: rgb(229, 179, 228); --c2: rgb(236, 172, 178); --c3: rgb(197, 185, 223);" />
-            <box data-lightness="70" data-algo="analogous" data-num-dots="3" data-position="234,173"
+            <box class="no-squircles" data-lightness="70" data-algo="analogous" data-num-dots="3" data-position="234,173"
                 style="--c1: rgb(235, 122, 159); --c2: rgb(239, 239, 118); --c3: rgb(210, 133, 224);" />
-            <box data-lightness="70" data-algo="analogous" data-num-dots="3" data-position="220,187"
+            <box class="no-squircles" data-lightness="70" data-algo="analogous" data-num-dots="3" data-position="220,187"
                 style="--c1: rgb(242, 115, 123); --c2: rgb(175, 242, 115); --c3: rgb(230, 125, 232);" />
-            <box data-lightness="60" data-algo="analogous" data-num-dots="3" data-position="225,237"
+            <box class="no-squircles" data-lightness="60" data-algo="analogous" data-num-dots="3" data-position="225,237"
                 style="--c1: rgb(221, 205, 85); --c2: rgb(97, 212, 94); --c3: rgb(215, 91, 124);" />
-            <box data-lightness="60" data-algo="analogous" data-num-dots="3" data-position="147,195"
+            <box class="no-squircles" data-lightness="60" data-algo="analogous" data-num-dots="3" data-position="147,195"
                 style="--c1: rgb(75, 231, 210); --c2: rgb(84, 175, 222); --c3: rgb(62, 244, 112);" />
-            <box data-lightness="55" data-algo="analogous" data-num-dots="3" data-position="81,84"
+            <box class="no-squircles" data-lightness="55" data-algo="analogous" data-num-dots="3" data-position="81,84"
                 style="--c1: rgb(122, 132, 158); --c2: rgb(137, 117, 164); --c3: rgb(116, 162, 164);" />
           </hbox>
           <hbox>
-            <box data-lightness="10" data-algo="float" data-num-dots="1" data-position="171,72" style="background:rgb(93, 86, 106);"></box>
+            <box class="no-squircles" data-lightness="10" data-algo="float" data-num-dots="1" data-position="171,72" style="background:rgb(93, 86, 106);"></box>
-            <box data-lightness="40" data-algo="float" data-num-dots="1" data-position="265,79" style="background: #997096;"></box>
+            <box class="no-squircles" data-lightness="40" data-algo="float" data-num-dots="1" data-position="265,79" style="background: #997096;"></box>
-            <box data-lightness="35" data-algo="float" data-num-dots="1" data-position="301,176" style="background: #956066;"></box>
+            <box class="no-squircles" data-lightness="35" data-algo="float" data-num-dots="1" data-position="301,176" style="background: #956066;"></box>
-            <box data-lightness="30" data-algo="float" data-num-dots="1" data-position="237,210" style="background: #9c6645;"></box>
+            <box class="no-squircles" data-lightness="30" data-algo="float" data-num-dots="1" data-position="237,210" style="background: #9c6645;"></box>
-            <box data-lightness="30" data-algo="float" data-num-dots="1" data-position="91,228" style="background: #517b6c;"></box>
+            <box class="no-squircles" data-lightness="30" data-algo="float" data-num-dots="1" data-position="91,228" style="background: #517b6c;"></box>
-            <box data-lightness="25" data-algo="float" data-num-dots="1" data-position="67,159" style="background: #576e75;"></box>
+            <box class="no-squircles" data-lightness="25" data-algo="float" data-num-dots="1" data-position="67,159" style="background: #576e75;"></box>
-            <box data-lightness="20" data-algo="float" data-num-dots="1" data-position="314,235" style="background:rgb(131, 109, 95);"></box>
+            <box class="no-squircles" data-lightness="20" data-algo="float" data-num-dots="1" data-position="314,235" style="background:rgb(131, 109, 95);"></box>
-            <box data-lightness="20" data-algo="float" data-num-dots="1" data-position="118,215" style="background: #447464;"></box>
+            <box class="no-squircles" data-lightness="20" data-algo="float" data-num-dots="1" data-position="118,215" style="background: #447464;"></box>
           </hbox>
           <hbox>
-            <box data-lightness="10" data-algo="analogous" data-num-dots="3" data-position="171,72"
+            <box class="no-squircles" data-lightness="10" data-algo="analogous" data-num-dots="3" data-position="171,72"
                 style="--c1: rgb(23, 17, 34); --c2: rgb(37, 14, 35); --c3: rgb(18, 22, 33);" />
-            <box data-lightness="40" data-algo="analogous" data-num-dots="3" data-position="265,79"
+            <box class="no-squircles" data-lightness="40" data-algo="analogous" data-num-dots="3" data-position="265,79"
                 style="--c1: rgb(128, 76, 124); --c2: rgb(141, 63, 66); --c3: rgb(97, 88, 116);" />
-            <box data-lightness="35" data-algo="analogous" data-num-dots="3" data-position="301,176"
+            <box class="no-squircles" data-lightness="35" data-algo="analogous" data-num-dots="3" data-position="301,176"
                 style="--c1: rgb(122, 56, 64); --c2: rgb(126, 121, 52); --c3: rgb(111, 68, 110);" />
-            <box data-lightness="30" data-algo="analogous" data-num-dots="3" data-position="237,210"
+            <box class="no-squircles" data-lightness="30" data-algo="analogous" data-num-dots="3" data-position="237,210"
                 style="--c1: rgb(131, 65, 22); --c2: rgb(64, 128, 25); --c3: rgb(122, 31, 91);" />
-            <box data-lightness="30" data-algo="analogous" data-num-dots="3" data-position="91,228"
+            <box class="no-squircles" data-lightness="30" data-algo="analogous" data-num-dots="3" data-position="91,228"
                 style="--c1: rgb(45, 108, 85); --c2: rgb(52, 85, 101); --c3: rgb(52, 118, 35);" />
-            <box data-lightness="25" data-algo="analogous" data-num-dots="3" data-position="67,159"
+            <box class="no-squircles" data-lightness="25" data-algo="analogous" data-num-dots="3" data-position="67,159"
                 style="--c1: rgb(45, 74, 83); --c2: rgb(46, 50, 81); --c3: rgb(38, 90, 65);" />
-            <box data-lightness="20" data-algo="analogous" data-num-dots="3" data-position="314,235"
+            <box class="no-squircles" data-lightness="20" data-algo="analogous" data-num-dots="3" data-position="314,235"
                 style="--c1: rgb(64, 47, 38); --c2: rgb(55, 64, 38); --c3: rgb(59, 43, 52);" />
-            <box data-lightness="20" data-algo="analogous" data-num-dots="3" data-position="118,215"
+            <box class="no-squircles" data-lightness="20" data-algo="analogous" data-num-dots="3" data-position="118,215"
                 style="--c1: rgb(22, 80, 61); --c2: rgb(26, 60, 76); --c3: rgb(27, 87, 15);" />
           </hbox>
           <hbox>
 # Start from black to white in a span on 8 steps and.
 # They must all go from the middle to the right side. They must always stay verically centered.
 # And reach to 180 on the right side, meaning we must divide the width in 16 segments.
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="340,180" style="background: rgb(224, 224, 224);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="337.5,180" style="background: rgb(224, 224, 224);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="315,180" style="background: rgb(192, 192, 192);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="292.5,180" style="background: rgb(160, 160, 160);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="270,180" style="background: rgb(128, 128, 128);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="247.5,180" style="background: rgb(96, 96, 96);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="225,180" style="background: rgb(64, 64, 64);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="202.5,180" style="background: rgb(32, 32, 32);"></box>
-            <box data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
+            <box class="no-squircles" data-type="explicit-black-white" data-algo="float" data-num-dots="1" 
                 data-position="180,180" style="background: rgb(0, 0, 0);"></box>
           </hbox>
         </hbox>
@@ -131,10 +131,10 @@
             </box>
             <html:input type="range" value="0.4" step="0.001" id="PanelUI-zen-gradient-generator-opacity"
 #ifdef XP_MACOSX
-              max="0.9"
+              max="0.8"
               min="0.30"
 #else
-              max="0.9"
+              max="0.8"
               min="0.25"
 #endif
               />

src/browser/components/contextualidentity/content/ContainerCreationPanel-mjs.patch

@@ -0,0 +1,21 @@
+diff --git a/browser/components/contextualidentity/content/ContainerCreationPanel.mjs b/browser/components/contextualidentity/content/ContainerCreationPanel.mjs
+index e04d7a4738192703e8f7f8555f50aaf0a619a5bd..b86e4853c421856f84ad8e017062f0d611b88aad 100644
+--- a/browser/components/contextualidentity/content/ContainerCreationPanel.mjs
++++ b/browser/components/contextualidentity/content/ContainerCreationPanel.mjs
+@@ -4,7 +4,7 @@
+ 
+ import { ContainerEditor } from "chrome://browser/content/usercontext/ContainerEditor.mjs";
+ 
+-const ANCHOR_ID = "userContext-icons";
++const ANCHOR_ID = "navigator-toolbox";
+ const ANCHOR_PINNED_CLASS = "container-anchor-pinned";
+ 
+ const lazy = {};
+@@ -95,6 +95,6 @@ export const ContainerCreationPanel = {
+       anchor.hidden = false;
+     }
+ 
+-    panel.openPopup(anchor, "bottomright topright");
++    panel.openPopup(anchor, win.gZenUIManager.panelUIPosition());
+   },
+ };

src/browser/components/customizableui/CustomizableUI-sys-mjs.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/customizableui/CustomizableUI.sys.mjs b/browser/components/customizableui/CustomizableUI.sys.mjs
-index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2681652e5 100644
+index 6d1885a54815d10b3a4e79f7e5acd61ab3abb159..3d6e092e7ed126cdee8c32229df2cfa13303d3a3 100644
 --- a/browser/components/customizableui/CustomizableUI.sys.mjs
 +++ b/browser/components/customizableui/CustomizableUI.sys.mjs
 @@ -13,6 +13,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
@@ -10,7 +10,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
    HomePage: "resource:///modules/HomePage.sys.mjs",
    PanelMultiView:
      "moz-src:///browser/components/customizableui/PanelMultiView.sys.mjs",
-@@ -348,7 +349,7 @@ var CustomizableUIInternal = {
+@@ -352,7 +353,7 @@ var CustomizableUIInternal = {
        {
          type: CustomizableUI.TYPE_PANEL,
          defaultPlacements: [],
@@ -19,7 +19,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
        },
        false
      );
-@@ -358,27 +359,23 @@ var CustomizableUIInternal = {
+@@ -362,27 +363,23 @@ var CustomizableUIInternal = {
        "back-button",
        "forward-button",
        "stop-reload-button",
@@ -50,17 +50,18 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
          defaultCollapsed: false,
        },
        true
-@@ -402,9 +399,6 @@ var CustomizableUIInternal = {
+@@ -406,10 +403,6 @@ var CustomizableUIInternal = {
          type: CustomizableUI.TYPE_TOOLBAR,
          defaultPlacements: [
            "tabbrowser-tabs",
 -          "new-tab-button",
+-          "spring",
 -          "alltabs-button",
 -          "ai-window-toggle",
          ],
          verticalTabsDefaultPlacements: [],
          defaultCollapsed: null,
-@@ -484,6 +478,7 @@ var CustomizableUIInternal = {
+@@ -502,6 +495,7 @@ var CustomizableUIInternal = {
        CustomizableUI.AREA_NAVBAR,
        CustomizableUI.AREA_BOOKMARKS,
        CustomizableUI.AREA_TABSTRIP,
@@ -68,7 +69,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      ]);
      if (AppConstants.platform != "macosx") {
        toolbars.add(CustomizableUI.AREA_MENUBAR);
-@@ -1285,6 +1280,9 @@ var CustomizableUIInternal = {
+@@ -1334,6 +1328,9 @@ var CustomizableUIInternal = {
          placements = gPlacements.get(area);
        }
  
@@ -78,7 +79,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
        // For toolbars that need it, mark as dirty.
        let defaultPlacements = areaProperties.get("defaultPlacements");
        if (
-@@ -1793,7 +1791,6 @@ var CustomizableUIInternal = {
+@@ -1842,7 +1839,6 @@ var CustomizableUIInternal = {
          lazy.log.info(
            "Widget " + aWidgetId + " not found, unable to remove from " + aArea
          );
@@ -86,7 +87,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
        }
  
        this.notifyDOMChange(widgetNode, null, container, true, () => {
-@@ -1803,7 +1800,7 @@ var CustomizableUIInternal = {
+@@ -1852,7 +1848,7 @@ var CustomizableUIInternal = {
          // We also need to remove the panel context menu if it's there:
          this.ensureButtonContextMenu(widgetNode);
          if (gPalette.has(aWidgetId) || this.isSpecialWidget(aWidgetId)) {
@@ -95,7 +96,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
          } else {
            window.gNavToolbox.palette.appendChild(widgetNode);
          }
-@@ -1971,16 +1968,16 @@ var CustomizableUIInternal = {
+@@ -2020,16 +2016,16 @@ var CustomizableUIInternal = {
          elem.setAttribute("skipintoolbarset", "true");
        }
      }
@@ -115,7 +116,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      // Handle initial state of vertical tabs.
      if (isVerticalTabs) {
        // Show the vertical tabs toolbar
-@@ -2222,6 +2219,10 @@ var CustomizableUIInternal = {
+@@ -2271,6 +2267,10 @@ var CustomizableUIInternal = {
     *   The identifier string of the area that aNode is being inserted into.
     */
    insertWidgetBefore(aNode, aNextNode, aContainer, aAreaId) {
@@ -126,7 +127,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      this.notifyDOMChange(aNode, aNextNode, aContainer, false, () => {
        this.setLocationAttributes(aNode, aAreaId);
        aContainer.insertBefore(aNode, aNextNode);
-@@ -4592,7 +4593,7 @@ var CustomizableUIInternal = {
+@@ -4647,7 +4647,7 @@ var CustomizableUIInternal = {
     * For all registered areas, builds those areas to reflect the current
     * placement state of all widgets.
     */
@@ -135,7 +136,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      for (let [areaId, areaNodes] of gBuildAreas) {
        let placements = gPlacements.get(areaId);
        let isFirstChangedToolbar = true;
-@@ -4603,7 +4604,7 @@ var CustomizableUIInternal = {
+@@ -4658,7 +4658,7 @@ var CustomizableUIInternal = {
          if (area.get("type") == CustomizableUI.TYPE_TOOLBAR) {
            let defaultCollapsed = area.get("defaultCollapsed");
            let win = areaNode.documentGlobal;
@@ -144,7 +145,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
              win.setToolbarVisibility(
                areaNode,
                typeof defaultCollapsed == "string"
-@@ -5899,6 +5900,7 @@ export var CustomizableUI = {
+@@ -5971,6 +5971,7 @@ export var CustomizableUI = {
    unregisterArea(aName, aDestroyPlacements) {
      CustomizableUIInternal.unregisterArea(aName, aDestroyPlacements);
    },
@@ -152,7 +153,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
    /**
     * Add a widget to an area.
     * If the area to which you try to add is not known to CustomizableUI,
-@@ -7869,7 +7871,9 @@ class OverflowableToolbar {
+@@ -7946,7 +7947,9 @@ class OverflowableToolbar {
          );
  
          if (webExtList && CustomizableUI.isWebExtensionWidget(child.id)) {
@@ -162,16 +163,27 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
            webExtList.insertBefore(child, webExtList.firstElementChild);
          } else {
            child.setAttribute("cui-anchorid", this.#defaultListButton.id);
-@@ -7929,7 +7933,7 @@ class OverflowableToolbar {
+@@ -7995,6 +7998,7 @@ class OverflowableToolbar {
+       return aElement.getBoundingClientRect().width;
+     }
+ 
++    let toolbar = this.#toolbar;
+     function sumChildrenInlineSize(aParent, aExceptChild = null) {
+       let sum = 0;
+       for (let child of aParent.children) {
+@@ -8006,7 +8010,10 @@ class OverflowableToolbar {
          ) {
            continue;
          }
 -        sum += parseFloat(style.marginLeft) + parseFloat(style.marginRight);
 +        sum += parseFloat(style.marginLeft) + (win.gZenVerticalTabsManager._hasSetSingleToolbar ? Math.max(0, parseFloat(style.marginRight)) : parseFloat(style.marginRight));
++        if (toolbar.id == 'zen-sidebar-top-buttons' && toolbar.hasAttribute("overflowing")) {
++          sum += 2; // Add extra padding that we remove from the CSS
++        }
          if (child != aExceptChild) {
            sum += getInlineSize(child);
          }
-@@ -7953,11 +7957,11 @@ class OverflowableToolbar {
+@@ -8030,11 +8037,11 @@ class OverflowableToolbar {
          parseFloat(style.paddingLeft) -
          parseFloat(style.paddingRight) -
          toolbarChildrenWidth;
@@ -185,7 +197,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      });
  
      lazy.log.debug(
-@@ -7972,7 +7976,39 @@ class OverflowableToolbar {
+@@ -8049,7 +8056,39 @@ class OverflowableToolbar {
        Math.max(targetWidth, targetChildrenWidth)
      );
      totalAvailWidth = Math.ceil(totalAvailWidth);
@@ -226,7 +238,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      return { isOverflowing, targetContentWidth, totalAvailWidth };
    }
  
-@@ -8033,7 +8069,11 @@ class OverflowableToolbar {
+@@ -8110,7 +8149,11 @@ class OverflowableToolbar {
              return;
            }
          }
@@ -239,7 +251,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
            lazy.log.debug(
              `Need ${minSize} but width is ${totalAvailWidth} so bailing`
            );
-@@ -8066,7 +8106,7 @@ class OverflowableToolbar {
+@@ -8143,7 +8186,7 @@ class OverflowableToolbar {
          }
        }
        if (!inserted) {
@@ -248,7 +260,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
        }
        child.removeAttribute("cui-anchorid");
        child.removeAttribute("overflowedItem");
-@@ -8192,6 +8232,9 @@ class OverflowableToolbar {
+@@ -8269,6 +8312,9 @@ class OverflowableToolbar {
     *   if no such list exists.
     */
    get #webExtList() {
@@ -258,7 +270,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      if (!this.#webExtListRef) {
        let targetID = this.#toolbar.getAttribute("addon-webext-overflowtarget");
        if (!targetID) {
-@@ -8203,6 +8246,9 @@ class OverflowableToolbar {
+@@ -8280,6 +8326,9 @@ class OverflowableToolbar {
        let win = this.#toolbar.documentGlobal;
        let { panel } = win.gUnifiedExtensions;
        this.#webExtListRef = panel.querySelector(`#${targetID}`);
@@ -268,7 +280,7 @@ index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2
      }
      return this.#webExtListRef;
    }
-@@ -8411,7 +8457,7 @@ class OverflowableToolbar {
+@@ -8488,7 +8537,7 @@ class OverflowableToolbar {
          break;
        }
        case "mousedown": {

src/browser/components/preferences/config/account-sync-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/preferences/config/account-sync.mjs b/browser/components/preferences/config/account-sync.mjs
-index b503987a08e2ce64bfc01c4e3a21e5e19ef834f0..b1c03a0b219fd3eddd93c1deaeb18ab79c85f168 100644
+index b01fd4bb163ad53139fcbd8e79e12ef994d1fa13..dd60be4fe268618d6596cd5cfac3342975bd241a 100644
 --- a/browser/components/preferences/config/account-sync.mjs
 +++ b/browser/components/preferences/config/account-sync.mjs
-@@ -42,6 +42,7 @@ Preferences.addAll([
+@@ -46,6 +46,7 @@ Preferences.addAll([
    { id: "services.sync.engine.creditcards", type: "bool" },
    { id: "services.sync.engine.addons", type: "bool" },
    { id: "services.sync.engine.prefs", type: "bool" },
@@ -10,7 +10,7 @@ index b503987a08e2ce64bfc01c4e3a21e5e19ef834f0..b1c03a0b219fd3eddd93c1deaeb18ab7
  ]);
  
  /**
-@@ -546,6 +547,7 @@ const SYNC_ENGINE_SETTINGS = [
+@@ -557,6 +558,7 @@ const SYNC_ENGINE_SETTINGS = [
      type: "payments",
    },
    { id: "syncAddons", pref: "services.sync.engine.addons", type: "addons" },
@@ -18,3 +18,37 @@ index b503987a08e2ce64bfc01c4e3a21e5e19ef834f0..b1c03a0b219fd3eddd93c1deaeb18ab7
    { id: "syncSettings", pref: "services.sync.engine.prefs", type: "settings" },
  ];
  
+@@ -564,6 +566,12 @@ SYNC_ENGINE_SETTINGS.forEach(({ id, pref }) => {
+   Preferences.addSetting({ id, pref });
+ });
+ 
++Preferences.addSetting({ id: "zenSyncWorkspacesGroup" });
++Preferences.addSetting({
++  id: "zenSyncWorkspaces",
++  pref: "services.sync.engine.spaces",
++});
++
+ Preferences.addSetting({
+   id: "syncEngines",
+   deps: SYNC_ENGINE_SETTINGS.map(({ id }) => id),
+@@ -995,6 +1003,20 @@ SettingGroupManager.registerGroups({
+             id: "syncEnginesList",
+             control: "sync-engines-list",
+           },
++          {
++            id: "zenSyncWorkspacesGroup",
++            control: "moz-box-item",
++            items: [
++              {
++                id: "zenSyncWorkspaces",
++                l10nId: "zen-settings-workspaces-sync",
++                control: "moz-toggle",
++                controlAttrs: {
++                  inputlayout: "inline-end",
++                },
++              },
++            ],
++          },
+           {
+             id: "syncChangeOptions",
+             control: "moz-box-button",

src/browser/components/preferences/preferences-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/preferences/preferences.js b/browser/components/preferences/preferences.js
-index c76a0647e14bac806d9428483bb565b3e10c31e7..2188f7808aca090f92574c7f5c55a28a9c5bb3f8 100644
+index 94612d8e28af58fcb04914440348b899a0a1e08f..da3b1ffd09745d09589283356d1001dbfb76a468 100644
 --- a/browser/components/preferences/preferences.js
 +++ b/browser/components/preferences/preferences.js
-@@ -131,6 +131,7 @@ ChromeUtils.defineLazyGetter(this, "gSubDialog", function () {
+@@ -132,6 +132,7 @@ ChromeUtils.defineLazyGetter(this, "gSubDialog", function () {
        styleSheets: [
          "chrome://browser/skin/preferences/dialog.css",
          "chrome://browser/skin/preferences/preferences.css",
@@ -10,7 +10,7 @@ index c76a0647e14bac806d9428483bb565b3e10c31e7..2188f7808aca090f92574c7f5c55a28a
        ],
        resizeCallback: async ({ title, frame }) => {
          // Search within main document and highlight matched keyword.
-@@ -437,6 +438,8 @@ const CONFIG_PANES = Object.freeze({
+@@ -471,6 +472,8 @@ const CONFIG_PANES = Object.freeze({
    tabsBrowsing: {
      l10nId: "tabs-browsing-section",
      groupIds: [
@@ -19,7 +19,7 @@ index c76a0647e14bac806d9428483bb565b3e10c31e7..2188f7808aca090f92574c7f5c55a28a
        "browserLayout",
        "tabs",
        "pageNavigation",
-@@ -483,7 +486,7 @@ function register_module(categoryName, categoryObject) {
+@@ -518,7 +521,7 @@ function register_module(categoryName, categoryObject) {
        }
        this._initted = true;
        let template = document.getElementById("template-" + categoryName);
@@ -28,7 +28,7 @@ index c76a0647e14bac806d9428483bb565b3e10c31e7..2188f7808aca090f92574c7f5c55a28a
          // Replace the template element with the nodes inside of it.
          template.replaceWith(template.content);
  
-@@ -527,6 +530,10 @@ function init_all() {
+@@ -562,6 +565,10 @@ function init_all() {
    register_module("paneHome", gHomePane);
    register_module("paneSearch", gSearchPane);
    register_module("panePrivacy", gPrivacyPane);
@@ -39,15 +39,3 @@ index c76a0647e14bac806d9428483bb565b3e10c31e7..2188f7808aca090f92574c7f5c55a28a
  
    // Restore the cached Firefox Labs nav button visibility so it shows
    // immediately when recipes are expected to be available, before
-@@ -656,9 +663,9 @@ async function gotoPref(
-   let redesignEnabled = srdSectionPrefs.all;
-   let categories = document.getElementById("categories");
-   const kDefaultCategoryInternalName = redesignEnabled
--    ? "paneSync"
-+    ? "paneTabsBrowsing"
-     : "paneGeneral";
--  const kDefaultCategory = redesignEnabled ? "sync" : "general";
-+  const kDefaultCategory = redesignEnabled ? "tabsBrowsing" : "general";
-   let hash = document.location.hash;
-   let category = aCategory || hash.substring(1) || kDefaultCategoryInternalName;
- 

src/browser/components/preferences/preferences-xhtml.patch

@@ -27,7 +27,7 @@ index 1b8c38159314b6edee9e6f455beb2b63db1ad3f0..1308345db640dba6b2848b49ef7c1181
 +      </html:moz-page-nav-button>
 +      <html:moz-page-nav-button id="category-zen-CKS"
 +        view="paneZenCKS"
-+        iconsrc="chrome://browser/skin/quickactions.svg"
++        iconsrc="chrome://browser/skin/preferences/category-accessibility.svg"
 +        data-l10n-id="pane-zen-CKS-title">
 +      </html:moz-page-nav-button>
 +      <html:moz-page-nav-button id="category-zen-marketplace"

src/browser/components/preferences/widgets/sync-engine-list/sync-engines-list-mjs.patch

@@ -0,0 +1,15 @@
+diff --git a/browser/components/preferences/widgets/sync-engine-list/sync-engines-list.mjs b/browser/components/preferences/widgets/sync-engine-list/sync-engines-list.mjs
+index 9359a485ed6212c7df49a8d4b1e4a8febbc1c9b6..132fea440cfa535e78b35f706e7ef2d6881f9ba6 100644
+--- a/browser/components/preferences/widgets/sync-engine-list/sync-engines-list.mjs
++++ b/browser/components/preferences/widgets/sync-engine-list/sync-engines-list.mjs
+@@ -50,6 +50,10 @@ const engineTypeToMetadata = {
+     iconSrc: "chrome://global/skin/icons/settings.svg",
+     l10nId: "sync-currently-syncing-settings",
+   },
++  workspaces: {
++    iconSrc: "chrome://devtools/skin/images/tool-storage.svg",
++    l10nId: "sync-currently-syncing-workspaces",
++  },
+ };
+ 
+ /**

src/browser/components/sessionstore/SessionStore-sys-mjs.patch

@@ -1,18 +1,20 @@
 diff --git a/browser/components/sessionstore/SessionStore.sys.mjs b/browser/components/sessionstore/SessionStore.sys.mjs
-index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee4aa3be28 100644
+index 536e06eec9f35bad3b8366733b23b5a8697df9c8..631a16bc7518108641993836f0c52e2ab6e6c967 100644
 --- a/browser/components/sessionstore/SessionStore.sys.mjs
 +++ b/browser/components/sessionstore/SessionStore.sys.mjs
-@@ -129,6 +129,9 @@ const TAB_EVENTS = [
+@@ -129,6 +129,11 @@ const TAB_EVENTS = [
    "TabSplitViewActivate",
    "SplitViewRemoved",
    "SplitViewCreated",
 +  "TabAddedToEssentials",
 +  "TabRemovedFromEssentials",
++  "TabMove",
++  "TabGroupMoved",
 +  "ZenWorkspaceDataChanged",
  ];
  
  const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
-@@ -201,6 +204,8 @@ ChromeUtils.defineESModuleGetters(lazy, {
+@@ -201,6 +206,8 @@ ChromeUtils.defineESModuleGetters(lazy, {
    TabStateCache: "resource:///modules/sessionstore/TabStateCache.sys.mjs",
    TabStateFlusher: "resource:///modules/sessionstore/TabStateFlusher.sys.mjs",
    setTimeout: "resource://gre/modules/Timer.sys.mjs",
@@ -21,7 +23,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  });
  
  ChromeUtils.defineLazyGetter(lazy, "blankURI", () => {
-@@ -1300,10 +1305,7 @@ var SessionStoreInternal = {
+@@ -1317,10 +1324,7 @@ var SessionStoreInternal = {
     */
    get willAutoRestore() {
      return (
@@ -33,17 +35,19 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
      );
    },
  
-@@ -1990,6 +1992,9 @@ var SessionStoreInternal = {
+@@ -2008,6 +2012,11 @@ var SessionStoreInternal = {
        case "TabPinned":
        case "TabUnpinned":
        case "SwapDocShells":
 +      case "TabRemovedFromEssentials":
 +      case "TabAddedToEssentials":
++      case "TabMove":
++      case "TabGroupMoved":
 +      case "ZenWorkspaceDataChanged":
          this.saveStateDelayed(win);
          break;
        case "TabGroupCreate":
-@@ -2099,6 +2104,10 @@ var SessionStoreInternal = {
+@@ -2117,6 +2126,10 @@ var SessionStoreInternal = {
        this._windows[aWindow.__SSi].isTaskbarTab = true;
      }
  
@@ -54,7 +58,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
      if (lazy.AIWindow.isAIWindowActiveAndEnabled(aWindow)) {
        this._windows[aWindow.__SSi].isAIWindow = true;
      }
-@@ -2135,7 +2144,7 @@ var SessionStoreInternal = {
+@@ -2153,7 +2166,7 @@ var SessionStoreInternal = {
      let isTaskbarTab = this._windows[aWindow.__SSi].isTaskbarTab;
      // A regular window is not a private window, taskbar tab window, or popup window
      let isRegularWindow =
@@ -63,7 +67,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
      // perform additional initialization when the first window is loading
      if (lazy.RunState.isStopped) {
-@@ -2147,7 +2156,7 @@ var SessionStoreInternal = {
+@@ -2165,7 +2178,7 @@ var SessionStoreInternal = {
          // to disk to NOW() to enforce a full interval before the next write.
          lazy.SessionSaver.updateLastSaveTime();
  
@@ -72,7 +76,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            this._log.debug(
              "initializeWindow, the window is private or a web app. Saving SessionStartup.state for possibly restoring later"
            );
-@@ -2191,6 +2200,7 @@ var SessionStoreInternal = {
+@@ -2209,6 +2222,7 @@ var SessionStoreInternal = {
            null,
            "sessionstore-one-or-no-tab-restored"
          );
@@ -80,7 +84,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
          this._deferredAllWindowsRestored.resolve();
        }
        // this window was opened by _openWindowWithState
-@@ -2240,7 +2250,6 @@ var SessionStoreInternal = {
+@@ -2258,7 +2272,6 @@ var SessionStoreInternal = {
        if (closedWindowState) {
          let newWindowState;
          if (
@@ -88,7 +92,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            !lazy.SessionStartup.willRestore()
          ) {
            // We want to split the window up into pinned tabs and unpinned tabs.
-@@ -2276,6 +2285,7 @@ var SessionStoreInternal = {
+@@ -2294,6 +2307,7 @@ var SessionStoreInternal = {
          }
  
          if (newWindowState) {
@@ -96,7 +100,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            // Ensure that the window state isn't hidden
            this._restoreCount = 1;
            let state = { windows: [newWindowState] };
-@@ -2312,6 +2322,9 @@ var SessionStoreInternal = {
+@@ -2330,6 +2344,9 @@ var SessionStoreInternal = {
        });
        this._shouldRestoreLastSession = false;
      }
@@ -106,7 +110,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
      if (this._restoreLastWindow && aWindow.toolbar.visible) {
        // always reset (if not a popup window)
-@@ -2462,7 +2475,7 @@ var SessionStoreInternal = {
+@@ -2480,7 +2497,7 @@ var SessionStoreInternal = {
  
      var tabbrowser = aWindow.gBrowser;
  
@@ -115,7 +119,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
      TAB_EVENTS.forEach(function (aEvent) {
        tabbrowser.tabContainer.removeEventListener(aEvent, this, true);
-@@ -2513,7 +2526,7 @@ var SessionStoreInternal = {
+@@ -2531,7 +2548,7 @@ var SessionStoreInternal = {
  
        let isLastRegularWindow =
          Object.values(this._windows).filter(
@@ -124,7 +128,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
          ).length == 1;
        this._log.debug(
          `onClose, closing window isLastRegularWindow? ${isLastRegularWindow}`
-@@ -2570,8 +2583,8 @@ var SessionStoreInternal = {
+@@ -2588,8 +2605,8 @@ var SessionStoreInternal = {
        // 2) Flush the window.
        // 3) When the flush is complete, revisit our decision to store the window
        //    in _closedWindows, and add/remove as necessary.
@@ -135,7 +139,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        }
  
        completionPromise = lazy.TabStateFlusher.flushWindow(aWindow).then(() => {
-@@ -2591,8 +2604,9 @@ var SessionStoreInternal = {
+@@ -2609,8 +2626,9 @@ var SessionStoreInternal = {
  
          // Save non-private windows if they have at
          // least one saveable tab or are the last window.
@@ -147,7 +151,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
            if (!isLastWindow && winData.closedId > -1) {
              this._addClosedAction(
-@@ -2668,7 +2682,7 @@ var SessionStoreInternal = {
+@@ -2686,7 +2704,7 @@ var SessionStoreInternal = {
     *        to call this method again asynchronously (for example, after
     *        a window flush).
     */
@@ -156,7 +160,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
      // Make sure SessionStore is still running, and make sure that we
      // haven't chosen to forget this window.
      if (
-@@ -2685,6 +2699,7 @@ var SessionStoreInternal = {
+@@ -2703,6 +2721,7 @@ var SessionStoreInternal = {
        // _closedWindows from a previous call to this function.
        let winIndex = this._closedWindows.indexOf(winData);
        let alreadyStored = winIndex != -1;
@@ -164,7 +168,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        // If sidebar command is truthy, i.e. sidebar is open, store sidebar settings
        let shouldStore = hasSaveableTabs || isLastWindow;
  
-@@ -3507,7 +3522,7 @@ var SessionStoreInternal = {
+@@ -3525,7 +3544,7 @@ var SessionStoreInternal = {
      if (!isPrivateWindow && tabState.isPrivate) {
        return;
      }
@@ -173,7 +177,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        return;
      }
  
-@@ -4246,6 +4261,12 @@ var SessionStoreInternal = {
+@@ -4264,6 +4283,12 @@ var SessionStoreInternal = {
          Math.min(tabState.index, tabState.entries.length)
        );
        tabState.pinned = false;
@@ -186,7 +190,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
        if (inBackground === false) {
          aWindow.gBrowser.selectedTab = newTab;
-@@ -4679,6 +4700,8 @@ var SessionStoreInternal = {
+@@ -4697,6 +4722,8 @@ var SessionStoreInternal = {
        // Append the tab if we're opening into a different window,
        tabIndex: aSource == aTargetWindow ? pos : Infinity,
        pinned: state.pinned,
@@ -195,7 +199,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        userContextId: state.userContextId,
        skipLoad: true,
        preferredRemoteType,
-@@ -5176,9 +5199,10 @@ var SessionStoreInternal = {
+@@ -5194,9 +5221,10 @@ var SessionStoreInternal = {
        if (activePageData.title && activePageData.title != activePageData.url) {
          win.gBrowser.setInitialTabTitle(tab, activePageData.title, {
            isContentTitle: true,
@@ -207,7 +211,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        }
      }
  
-@@ -5543,7 +5567,7 @@ var SessionStoreInternal = {
+@@ -5561,7 +5589,7 @@ var SessionStoreInternal = {
  
      for (let i = tabbrowser.pinnedTabCount; i < tabbrowser.tabs.length; i++) {
        let tab = tabbrowser.tabs[i];
@@ -216,7 +220,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
          removableTabs.push(tab);
        }
      }
-@@ -5656,7 +5680,7 @@ var SessionStoreInternal = {
+@@ -5674,7 +5702,7 @@ var SessionStoreInternal = {
  
      // collect the data for all windows
      for (ix in this._windows) {
@@ -225,7 +229,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
          // window data is still in _statesToRestore
          continue;
        }
-@@ -5800,11 +5824,12 @@ var SessionStoreInternal = {
+@@ -5818,11 +5846,12 @@ var SessionStoreInternal = {
      }
  
      let tabbrowser = aWindow.gBrowser;
@@ -239,7 +243,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
      // update the internal state data for this window
      for (let tab of tabs) {
        if (tab == aWindow.FirefoxViewHandler.tab) {
-@@ -5815,6 +5840,9 @@ var SessionStoreInternal = {
+@@ -5833,6 +5862,9 @@ var SessionStoreInternal = {
        tabsData.push(tabData);
      }
  
@@ -249,7 +253,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
      // update tab group state for this window
      winData.groups = [];
      for (let tabGroup of aWindow.gBrowser.tabGroups) {
-@@ -5831,7 +5859,7 @@ var SessionStoreInternal = {
+@@ -5849,7 +5881,7 @@ var SessionStoreInternal = {
      // a window is closed, point to the first item in the tab strip instead (it will never be the Firefox View tab,
      // since it's only inserted into the tab strip after it's selected).
      if (aWindow.FirefoxViewHandler.tab?.selected) {
@@ -258,7 +262,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        winData.title = tabbrowser.tabs[0].label;
      }
      winData.selected = selectedIndex;
-@@ -6033,8 +6061,8 @@ var SessionStoreInternal = {
+@@ -6051,8 +6083,8 @@ var SessionStoreInternal = {
      // selectTab represents.
      let selectTab = 0;
      if (overwriteTabs) {
@@ -269,7 +273,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
        selectTab = Math.min(selectTab, winData.tabs.length);
      }
  
-@@ -6056,6 +6084,7 @@ var SessionStoreInternal = {
+@@ -6074,6 +6106,7 @@ var SessionStoreInternal = {
      if (overwriteTabs) {
        for (let i = tabbrowser.browsers.length - 1; i >= 0; i--) {
          if (!tabbrowser.tabs[i].selected) {
@@ -277,7 +281,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            tabbrowser.removeTab(tabbrowser.tabs[i]);
          }
        }
-@@ -6090,6 +6119,12 @@ var SessionStoreInternal = {
+@@ -6108,6 +6141,12 @@ var SessionStoreInternal = {
          savedTabGroup => !openTabGroupIdsInWindow.has(savedTabGroup.id)
        );
      }
@@ -290,7 +294,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
      // Move the originally open tabs to the end.
      if (initialTabs) {
-@@ -6656,6 +6691,25 @@ var SessionStoreInternal = {
+@@ -6674,6 +6713,25 @@ var SessionStoreInternal = {
  
      // Most of tabData has been restored, now continue with restoring
      // attributes that may trigger external events.
@@ -316,7 +320,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
      if (tabData.pinned) {
        tabbrowser.pinTab(tab);
-@@ -6838,6 +6892,9 @@ var SessionStoreInternal = {
+@@ -6859,6 +6917,9 @@ var SessionStoreInternal = {
          aWindow.gURLBar.readOnly = false;
        }
      }
@@ -326,7 +330,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
  
      let promiseParts = Promise.withResolvers();
      aWindow.setTimeout(() => {
-@@ -7633,7 +7690,7 @@ var SessionStoreInternal = {
+@@ -7654,7 +7715,7 @@ var SessionStoreInternal = {
  
        let groupsToSave = new Map();
        for (let tIndex = 0; tIndex < window.tabs.length; ) {
@@ -335,7 +339,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            // Adjust window.selected
            if (tIndex + 1 < window.selected) {
              window.selected -= 1;
-@@ -7648,7 +7705,7 @@ var SessionStoreInternal = {
+@@ -7669,7 +7730,7 @@ var SessionStoreInternal = {
            );
            // We don't want to increment tIndex here.
            continue;
@@ -344,7 +348,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            // Convert any open groups into saved groups.
            let groupStateToSave = window.groups.find(
              groupState => groupState.id == window.tabs[tIndex].groupId
-@@ -8193,7 +8250,6 @@ var SessionStoreInternal = {
+@@ -8233,7 +8294,6 @@ var SessionStoreInternal = {
      timer.initWithCallback(
        function () {
          if (beats <= 0) {
@@ -352,7 +356,7 @@ index 11191a82a0f0dc6eee60f9de52a63bc6085c3981..f995c3b297c53aa6ee2219bfc09515ee
            Glean.sessionRestore.shutdownFlushAllOutcomes.timed_out.add(1);
            deferred.resolve();
          }
-@@ -8671,6 +8727,7 @@ var SessionStoreInternal = {
+@@ -8711,6 +8771,7 @@ var SessionStoreInternal = {
      if (
        !savedTabGroupState.tabs.length ||
        this.getSavedTabGroup(savedTabGroupState.id)

src/browser/components/tabbrowser/content/drag-and-drop-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/drag-and-drop.js b/browser/components/tabbrowser/content/drag-and-drop.js
-index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b15a030046 100644
+index 70b37f93c4e8ff4ad9a2452681e468d23914c1b5..dbf2d9c83dafbe0e0b4e6caf3835edc8edf9bcf4 100644
 --- a/browser/components/tabbrowser/content/drag-and-drop.js
 +++ b/browser/components/tabbrowser/content/drag-and-drop.js
 @@ -35,6 +35,9 @@
@@ -12,7 +12,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
      if (isTab(element) || isSplitViewWrapper(element)) {
        return element;
      }
-@@ -118,6 +121,9 @@
+@@ -128,6 +131,9 @@
        }
  
        let draggedTab = event.dataTransfer.mozGetDataAt(TAB_DROP_TYPE, 0);
@@ -22,7 +22,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
        if (
          (dropEffect == "move" || dropEffect == "copy") &&
          document == draggedTab.ownerDocument &&
-@@ -138,6 +144,7 @@
+@@ -148,6 +154,7 @@
            !draggedTab.group.collapsed
          ) {
            draggedTab.group.collapsed = true;
@@ -30,7 +30,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
          }
  
          if (dropEffect == "move") {
-@@ -145,10 +152,6 @@
+@@ -155,10 +162,6 @@
  
            // Pinned tabs in expanded vertical mode are on a grid format and require
            // different logic to drag and drop.
@@ -41,7 +41,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            this._animateTabMove(event);
            return;
          }
-@@ -287,6 +290,10 @@
+@@ -297,6 +300,10 @@
  
        this._tabDropIndicator.hidden = true;
        event.stopPropagation();
@@ -52,7 +52,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
        if (draggedTab && dropEffect == "copy") {
          let duplicatedDraggedTab;
          let duplicatedTabs = [];
-@@ -312,12 +319,16 @@
+@@ -324,12 +331,16 @@
          let translateOffsetY = oldTranslateY % tabHeight;
          let newTranslateX = oldTranslateX - translateOffsetX;
          let newTranslateY = oldTranslateY - translateOffsetY;
@@ -73,7 +73,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
  
          if (this._tabbrowserTabs.isContainerVerticalPinnedGrid(draggedTab)) {
            // Update both translate axis for pinned vertical expanded tabs
-@@ -392,11 +403,13 @@
+@@ -404,11 +415,13 @@
            this._dragToPinPromoCard,
          ];
          let shouldPin =
@@ -87,15 +87,15 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            isTab(draggedTab) &&
            draggedTab.pinned &&
            this._tabbrowserTabs.arrowScrollbox.contains(event.target);
-@@ -466,6 +479,7 @@
+@@ -484,6 +497,7 @@
            }
          }
  
 +        shouldTranslate = false;
          if (shouldTranslate) {
+           this.#dropAnimationEndTime = Date.now() + DROP_ANIMATION_GRACE_MS;
            let translationPromises = [];
-           for (let item of movingTabs) {
+@@ -496,7 +510,7 @@
-@@ -477,7 +491,7 @@
                  item.removeAttribute("tabdrop-samewindow");
                  resolve();
                };
@@ -104,7 +104,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
                  postTransitionCleanup();
                } else {
                  let onTransitionEnd = transitionendEvent => {
-@@ -552,7 +566,7 @@
+@@ -580,7 +594,7 @@
            if (tab.selected) {
              selectedTab = tab;
              indexForSelectedTab = newIndex;
@@ -113,7 +113,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
              const droppedIntoPinnedArea = dropIndex < gBrowser.pinnedTabCount;
              const newSplitView = gBrowser.adoptSplitView(tab, {
                elementIndex: droppedIntoPinnedArea
-@@ -577,7 +591,7 @@
+@@ -605,7 +619,7 @@
              }
            }
          }
@@ -122,7 +122,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            const newTab = gBrowser.adoptTab(selectedTab, {
              elementIndex: indexForSelectedTab,
              selectTab: selectedTab == draggedTab,
-@@ -611,10 +625,6 @@
+@@ -639,10 +653,6 @@
                this._tabbrowserTabs.dragAndDropElements[
                  gBrowser.pinnedTabCount + unpinnedSplitViews.length - 1
                ];
@@ -133,7 +133,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            }
          }
        } else {
-@@ -664,6 +674,7 @@
+@@ -703,6 +713,7 @@
  
            let nextItem = this._tabbrowserTabs.dragAndDropElements[newIndex];
            let tabGroup = isTab(nextItem) && nextItem.group;
@@ -141,12 +141,15 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            gBrowser.loadTabs(urls, {
              inBackground,
              replace,
-@@ -705,7 +716,16 @@
+@@ -744,6 +755,22 @@
          this._expandGroupOnDrop(draggedTab);
        }
-       this._resetTabsAfterDrop(draggedTab.ownerDocument);
+       this._resetTabsAfterDrop(draggedTab);
--
++      if (
-+      if (!dt.mozUserCancelled && dt.dropEffect == "none" && !this._isCustomizing) {
++        !dt.mozUserCancelled &&
++        dt.dropEffect == "none" &&
++        !this._tabbrowserTabs._isCustomizing
++      ) {
 +        const moved = gZenViewSplitter.moveTabToSplitView(event, draggedTab);
 +        if (moved) {
 +          delete draggedTab._dragData;
@@ -154,12 +157,14 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
 +        }
 +      } else if (dt.mozUserCancelled) {
 +        gZenViewSplitter.onBrowserDragEndToSplit(event, true);
-+        if (gZenViewSplitter._lastOpenedTab) gZenViewSplitter._lastOpenedTab._visuallySelected = false;
++        if (gZenViewSplitter._lastOpenedTab) {
++          gZenViewSplitter._lastOpenedTab._visuallySelected = false;
 +        }
++      }
+ 
        if (
          dt.mozUserCancelled ||
-         dt.dropEffect != "none" ||
+@@ -1074,11 +1101,10 @@
-@@ -927,11 +947,10 @@
          return this.#getHorizontalScrollboxDragTarget(event, ignoreSides);
        }
        while (target) {
@@ -175,7 +180,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            break;
          }
          target = target.parentNode;
-@@ -961,6 +980,9 @@
+@@ -1108,6 +1134,9 @@
            return null;
          }
        }
@@ -185,17 +190,36 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
        return target;
      }
  
-@@ -1014,7 +1036,8 @@
+@@ -1170,14 +1199,20 @@
-         isTabGroupLabel(draggedTab) &&
+       let releaseReservedSpace = () =>
-         draggedTab._dragData?.expandGroupOnDrop
+         this.#releaseSpaceInScrolledContent(periphery);
-       ) {
+       if (group.collapsed) {
--        draggedTab.group.collapsed = false;
+-        // The group's tabs animate back to their full size, so hold on to the
-+        draggedTab.group.collapsed = draggedTab.group.hasAttribute("has-active");
+-        // space reserved for them until they get there.
-+        gZenFolders.animateGroupMove(draggedTab.group, true);
+-        group.addEventListener(
+-          "TabGroupAnimationComplete",
+-          releaseReservedSpace,
+-          { once: true }
+-        );
+-        group.collapsed = false;
++        const expand = !group.hasAttribute("has-active");
++        if (expand) {
++          // The group's tabs animate back to their full size, so hold on to the
++          // space reserved for them until they get there.
++          group.addEventListener(
++            "TabGroupAnimationComplete",
++            releaseReservedSpace,
++            { once: true }
++          );
++        } else {
++          releaseReservedSpace();
++        }
++        group.collapsed = !expand;
++        gZenFolders.animateGroupMove(group, true);
+       } else {
+         releaseReservedSpace();
        }
-     }
+@@ -1362,7 +1397,6 @@
- 
-@@ -1206,7 +1229,6 @@
          // using updateDragImage. On Linux, we can use a panel.
          if (platform == "win" || platform == "macosx") {
            captureListener = function () {
@@ -203,7 +227,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
            };
          } else {
            // Create a panel to use it in setDragImage
-@@ -1244,7 +1266,6 @@
+@@ -1400,7 +1434,6 @@
          );
          dragImageOffset = dragImageOffset * scale;
        }
@@ -211,7 +235,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
  
        // _dragData.offsetX/Y give the coordinates that the mouse should be
        // positioned relative to the corner of the new window created upon
-@@ -1263,7 +1284,7 @@
+@@ -1419,7 +1452,7 @@
        let dropEffect = this.getDropEffectForTabDrag(event);
        let isMovingInTabStrip = !fromTabList && dropEffect == "move";
        let collapseTabGroupDuringDrag =
@@ -220,7 +244,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
  
        tab._dragData = {
          offsetX: this._tabbrowserTabs.verticalMode
-@@ -1273,7 +1294,7 @@
+@@ -1429,7 +1462,7 @@
            ? event.screenY - window.screenY - tabOffset
            : event.screenY - window.screenY,
          scrollPos:
@@ -229,7 +253,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
              ? this._tabbrowserTabs.pinnedTabsContainer.scrollPosition
              : this._tabbrowserTabs.arrowScrollbox.scrollPosition,
          screenX: event.screenX,
-@@ -1320,6 +1341,7 @@
+@@ -1522,6 +1555,7 @@
        if (tabStripItemElement.hasAttribute("dragtarget")) {
          return;
        }
@@ -237,7 +261,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
        let isPinned = tab.pinned;
        let dragAndDropElements = this._tabbrowserTabs.dragAndDropElements;
        let isGrid = this._tabbrowserTabs.isContainerVerticalPinnedGrid(tab);
-@@ -1686,23 +1708,6 @@
+@@ -1895,23 +1929,6 @@
  
        // Slide the relevant tabs to their new position.
        // non-moving tabs adjust for RTL
@@ -261,7 +285,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
        // moving tabs don't adjust for RTL
        for (let item of selectedElements) {
          if (
-@@ -1751,7 +1756,6 @@
+@@ -1960,7 +1977,6 @@
        for (let item of this._tabbrowserTabs.dragAndDropElements) {
          delete item._moveTogetherSelectedTabsData;
          item = elementToMove(item);
@@ -269,7 +293,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
          item.removeAttribute("multiselected-move-together");
        }
      }
-@@ -2598,7 +2602,6 @@
+@@ -2812,7 +2828,6 @@
          tab.style.top = "";
          tab.style.maxWidth = "";
          tab.style.pointerEvents = "";
@@ -277,7 +301,7 @@ index 8bb1219962a1368f50b53c61041f135c68e35f31..8e72441d26883cbef7a352b00c0fe2b1
          tab.removeAttribute("small-stack");
          tab.removeAttribute("big-stack");
        }
-@@ -2607,11 +2610,9 @@
+@@ -2821,11 +2836,9 @@
        )) {
          label.style.width = "";
          label.style.maxWidth = "";

src/browser/components/tabbrowser/content/tab-context-menu-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/tabbrowser/content/tab-context-menu.js b/browser/components/tabbrowser/content/tab-context-menu.js
-index 4a7cb33a4d9067d469bbe09d4cd8844581642f7a..2e2404b78deb428e57d01b8b929231f675a21323 100644
+index 4a7cb33a4d9067d469bbe09d4cd8844581642f7a..d7f75471a207cccac6ca3dec49037ac30dd76163 100644
 --- a/browser/components/tabbrowser/content/tab-context-menu.js
 +++ b/browser/components/tabbrowser/content/tab-context-menu.js
-@@ -839,7 +839,8 @@ var TabContextMenu = {
+@@ -839,13 +839,15 @@ var TabContextMenu = {
      );
      contextUnpinSelectedTabs.hidden =
        !this.contextTab.pinned || !this.multiselected;
@@ -12,3 +12,10 @@ index 4a7cb33a4d9067d469bbe09d4cd8844581642f7a..2e2404b78deb428e57d01b8b929231f6
      // Build Ask Chat items. The classic layout shows the full ask-chat submenu
      // (#context_askChat); the alt layout shows only a flat "Summarize Page" item
      // (#context_askChatSummarize). Hide whichever one this layout doesn't use so
+     // a pref toggle reverses cleanly.
+     if (!this._altTabContextMenu) {
+       document.getElementById("context_askChatSummarize").hidden = true;
++      document.getElementById("context_aiSeparator").hidden = true;
+       TabContextMenu.GenAI.buildTabMenu(
+         document.getElementById("context_askChat"),
+         this

src/browser/components/tabbrowser/content/tabbrowser-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/tabbrowser/content/tabbrowser.js b/browser/components/tabbrowser/content/tabbrowser.js
-index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da5504f9d8 100644
+index 43180487a2fac15b7a65fac94f233eeed9094990..ae1288974cae29da929f27b78ff8db542566eba2 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
-@@ -513,6 +513,7 @@
+@@ -514,6 +514,7 @@
       * @type {MozBrowser[]}
       */
      get splitViewBrowsers() {
@@ -10,7 +10,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        const browsers = [];
        if (this.#activeSplitView) {
          for (const tab of this.#activeSplitView.tabs) {
-@@ -611,15 +612,66 @@
+@@ -612,15 +613,66 @@
        return this.tabContainer.visibleTabs;
      }
  
@@ -79,7 +79,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
      setSelectedTab(val, metricsContext = null) {
        if (this.selectedTab === val) {
          return;
-@@ -632,6 +684,9 @@
+@@ -633,6 +685,9 @@
        ) {
          return;
        }
@@ -89,7 +89,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // Update the tab
        this.tabbox.selectedTab = val;
  
-@@ -708,6 +763,10 @@
+@@ -709,6 +764,10 @@
          userContextId = parseInt(tabArgument.getAttribute("usercontextid"), 10);
        }
  
@@ -100,7 +100,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (openWindowInfo) {
          userContextId = openWindowInfo.originAttributes.userContextId;
        }
-@@ -809,6 +868,8 @@
+@@ -810,6 +869,8 @@
        this.tabpanels.appendChild(panel);
  
        let tab = this.tabs[0];
@@ -109,7 +109,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        tab.linkedPanel = uniqueId;
        this._selectedTab = tab;
        this._selectedBrowser = browser;
-@@ -1178,18 +1239,24 @@
+@@ -1179,18 +1240,24 @@
       *   The context for the operation for telemetry purposes, defaults to an unknown context.
       */
      pinTab(aTab, { metricsContext = this.TabMetrics.UNKNOWN_CONTEXT } = {}) {
@@ -135,7 +135,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        aTab.setAttribute("pinned", "true");
        this._updateTabBarForPinnedTabs();
-@@ -1206,16 +1273,25 @@
+@@ -1207,16 +1274,25 @@
       *   The context for the operation for telemetry purposes, defaults to an unknown context.
       */
      unpinTab(aTab, { metricsContext = this.TabMetrics.UNKNOWN_CONTEXT } = {}) {
@@ -162,7 +162,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        });
  
        aTab.style.marginInlineStart = "";
-@@ -1430,6 +1506,9 @@
+@@ -1432,6 +1508,9 @@
  
        let LOCAL_PROTOCOLS = ["chrome:", "about:", "resource:", "data:"];
  
@@ -172,7 +172,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (
          aIconURL &&
          !LOCAL_PROTOCOLS.some(protocol => aIconURL.startsWith(protocol))
-@@ -1439,6 +1518,9 @@
+@@ -1441,6 +1520,9 @@
          );
          return;
        }
@@ -182,7 +182,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        let browser = this.getBrowserForTab(aTab);
        browser.mIconURL = aIconURL;
-@@ -1761,7 +1843,6 @@
+@@ -1763,7 +1845,6 @@
  
        // Preview mode should not reset the owner
        if (!this.#previewMode && !oldTab.selected) {
@@ -190,7 +190,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        }
  
        let lastRelatedTab = this.#lastRelatedTabMap.get(oldTab);
-@@ -1852,6 +1933,7 @@
+@@ -1854,6 +1935,7 @@
        if (!this.#previewMode) {
          newTab.recordTimeFromUnloadToReload();
          newTab.updateLastAccessed();
@@ -198,7 +198,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          oldTab.updateLastAccessed();
          // if this is the foreground window, update the last-seen timestamps.
          if (this.documentGlobal == BrowserWindowTracker.getTopWindow()) {
-@@ -2066,6 +2148,9 @@
+@@ -2068,6 +2150,9 @@
        }
  
        let activeEl = document.activeElement;
@@ -208,7 +208,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // If focus is on the old tab, move it to the new tab.
        if (activeEl == oldTab) {
          newTab.focus();
-@@ -2104,7 +2189,7 @@
+@@ -2106,7 +2191,7 @@
        // Focus the location bar if it was previously focused for that tab.
        // In full screen mode, only bother making the location bar visible
        // if the tab is a blank one.
@@ -217,7 +217,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          let selectURL = () => {
            if (this._asyncTabSwitching) {
              // Set _awaitingSetURI flag to suppress popup notification
-@@ -2392,7 +2477,12 @@
+@@ -2394,7 +2479,12 @@
        return this._setTabLabel(aTab, aLabel);
      }
  
@@ -231,7 +231,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (!aLabel || (isURL && /^about:reader\?url=/.test(aLabel))) {
          return false;
        }
-@@ -2518,7 +2608,7 @@
+@@ -2520,7 +2610,7 @@
          newIndex = this.selectedTab._tPos + 1;
        }
  
@@ -240,7 +240,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          if (this.isTabGroupLabel(targetTab)) {
            throw new Error(
              "Replacing a tab group label with a tab is not supported"
-@@ -2793,6 +2883,7 @@
+@@ -2795,6 +2885,7 @@
        uriIsAboutBlank,
        userContextId,
        skipLoad,
@@ -248,7 +248,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
      } = {}) {
        let b = document.createXULElement("browser");
        // Use the JSM global to create the permanentKey, so that if the
-@@ -2866,8 +2957,7 @@
+@@ -2868,8 +2959,7 @@
          // we use a different attribute name for this?
          b.setAttribute("name", name);
        }
@@ -258,7 +258,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          b.setAttribute("transparent", "true");
        }
  
-@@ -3022,7 +3112,7 @@
+@@ -3024,7 +3114,7 @@
  
        let panel = this.getPanel(browser);
        let uniqueId = this._generateUniquePanelID();
@@ -267,7 +267,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        aTab.linkedPanel = uniqueId;
  
        // Inject the <browser> into the DOM if necessary.
-@@ -3082,8 +3172,8 @@
+@@ -3084,8 +3174,8 @@
        // If we transitioned from one browser to two browsers, we need to set
        // hasSiblings=false on both the existing browser and the new browser.
        if (this.tabs.length == 2) {
@@ -278,7 +278,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        } else {
          aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
        }
-@@ -3268,7 +3358,6 @@
+@@ -3270,7 +3360,6 @@
              this.selectedTab = this.addTrustedTab(BROWSER_NEW_TAB_URL, {
                tabIndex: tab._tPos + 1,
                userContextId: tab.userContextId,
@@ -286,7 +286,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
                focusUrlBar: true,
              });
              resolve(this.selectedBrowser);
-@@ -3378,6 +3467,10 @@
+@@ -3380,6 +3469,10 @@
          schemelessInput,
          hasValidUserGestureActivation = false,
          textDirectiveUserActivation = false,
@@ -297,7 +297,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        } = {}
      ) {
        // all callers of addTab that pass a params object need to pass
-@@ -3388,10 +3481,25 @@
+@@ -3390,10 +3483,25 @@
          );
        }
  
@@ -323,7 +323,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // If we're opening a foreground tab, set the owner by default.
        ownerTab ??= inBackground ? null : this.selectedTab;
  
-@@ -3399,6 +3507,7 @@
+@@ -3401,6 +3509,7 @@
        if (this.selectedTab.owner) {
          this.selectedTab.owner = null;
        }
@@ -331,7 +331,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        // Find the tab that opened this one, if any. This is used for
        // determining positioning, and inherited attributes such as the
-@@ -3451,6 +3560,22 @@
+@@ -3453,6 +3562,22 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -354,7 +354,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          if (insertTab) {
            // Insert the tab into the tab container in the correct position.
            this.#insertTabAtIndex(t, {
-@@ -3459,6 +3584,7 @@
+@@ -3461,6 +3586,7 @@
              ownerTab,
              openerTab,
              pinned,
@@ -362,7 +362,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
              bulkOrderedOpen,
              tabGroup: tabGroup ?? openerTab?.group,
            });
-@@ -3477,6 +3603,7 @@
+@@ -3479,6 +3605,7 @@
            openWindowInfo,
            skipLoad,
            triggeringRemoteType,
@@ -370,7 +370,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          }));
  
          if (focusUrlBar) {
-@@ -3601,6 +3728,12 @@
+@@ -3603,6 +3730,12 @@
          }
        }
  
@@ -383,7 +383,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // Additionally send pinned tab events
        if (pinned) {
          this.#notifyPinnedStatus(t);
-@@ -3611,6 +3744,15 @@
+@@ -3613,6 +3746,15 @@
        if (!inBackground) {
          this.selectedTab = t;
        }
@@ -399,7 +399,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        return t;
      }
  
-@@ -3834,6 +3976,7 @@
+@@ -3836,6 +3978,7 @@
          insertBefore = null,
          isAdoptingGroup = false,
          metricsContext = this.TabMetrics.UNKNOWN_CONTEXT,
@@ -407,7 +407,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        } = {}
      ) {
        if (
-@@ -3844,9 +3987,6 @@
+@@ -3846,9 +3989,6 @@
              !this.isSplitViewWrapper(tabOrSplitView)
          )
        ) {
@@ -417,7 +417,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        }
  
        if (!color) {
-@@ -3867,9 +4007,14 @@
+@@ -3869,9 +4009,14 @@
          label,
          isAdoptingGroup
        );
@@ -434,7 +434,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        );
        group.addTabs(tabsAndSplitViews, metricsContext);
  
-@@ -3973,7 +4118,7 @@
+@@ -3975,7 +4120,7 @@
        }
  
        this.#handleTabMove(tab, () =>
@@ -443,7 +443,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        );
      }
  
-@@ -4059,6 +4204,7 @@
+@@ -4061,6 +4206,7 @@
          color: group.color,
          insertBefore: newTabs[0],
          isAdoptingGroup: true,
@@ -451,7 +451,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        });
      }
  
-@@ -4269,6 +4415,7 @@
+@@ -4271,6 +4417,7 @@
          openWindowInfo,
          skipLoad,
          triggeringRemoteType,
@@ -459,7 +459,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        }
      ) {
        // If we don't have a preferred remote type (or it is `NOT_REMOTE`), and
-@@ -4329,6 +4476,7 @@
+@@ -4331,6 +4478,7 @@
            openWindowInfo,
            name,
            skipLoad,
@@ -467,7 +467,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          });
        }
  
-@@ -4542,9 +4690,9 @@
+@@ -4544,9 +4692,9 @@
          }
  
          // Add a new tab if needed.
@@ -479,7 +479,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
            let url = "about:blank";
            if (tabData.entries?.length) {
-@@ -4577,8 +4725,10 @@
+@@ -4579,8 +4727,10 @@
              insertTab: false,
              skipLoad: true,
              preferredRemoteType,
@@ -491,7 +491,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
            if (select) {
              tabToSelect = tab;
            }
-@@ -4600,7 +4750,8 @@
+@@ -4602,7 +4752,8 @@
            this.pinTab(tab);
            // Then ensure all the tab open/pinning information is sent.
            this._fireTabOpen(tab, {});
@@ -501,7 +501,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
            let { groupId } = tabData;
            const tabGroup = tabGroupWorkingData.get(groupId);
            // if a tab refers to a tab group we don't know, skip any group
-@@ -4620,7 +4771,10 @@
+@@ -4622,7 +4773,10 @@
                  tabGroup.stateData.id,
                  tabGroup.stateData.color,
                  tabGroup.stateData.collapsed,
@@ -513,7 +513,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
                );
                tabsFragment.appendChild(tabGroup.node);
              }
-@@ -4675,9 +4829,21 @@
+@@ -4677,9 +4831,21 @@
        // to remove the old selected tab.
        if (tabToSelect) {
          let leftoverTab = this.selectedTab;
@@ -535,7 +535,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        if (tabs.length > 1 || !tabs[0].selected) {
          this._updateTabsAfterInsert();
-@@ -4882,11 +5048,17 @@
+@@ -4884,11 +5050,17 @@
        if (ownerTab) {
          tab.owner = ownerTab;
        }
@@ -554,7 +554,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          if (
            !bulkOrderedOpen &&
            ((openerTab &&
-@@ -4898,7 +5070,7 @@
+@@ -4900,7 +5072,7 @@
            let lastRelatedTab =
              openerTab && this.#lastRelatedTabMap.get(openerTab);
            let previousTab = lastRelatedTab || openerTab || this.selectedTab;
@@ -563,7 +563,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
              tabGroup = previousTab.group;
            }
            if (
-@@ -4914,7 +5086,7 @@
+@@ -4916,7 +5088,7 @@
                  previousTab.splitview
                ) + 1;
            } else if (previousTab.visible) {
@@ -572,7 +572,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
            } else if (previousTab == FirefoxViewHandler.tab) {
              elementIndex = 0;
            }
-@@ -4942,14 +5114,14 @@
+@@ -4944,14 +5116,14 @@
        }
        // Ensure index is within bounds.
        if (tab.pinned) {
@@ -591,7 +591,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        if (pinned && !itemAfter?.pinned) {
          itemAfter = null;
-@@ -4966,7 +5138,7 @@
+@@ -4968,7 +5140,7 @@
  
        this.tabContainer._invalidateCachedTabs();
  
@@ -600,7 +600,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          if (
            (this.isTab(itemAfter) && itemAfter.group == tabGroup) ||
            this.isSplitViewWrapper(itemAfter)
-@@ -4997,7 +5169,11 @@
+@@ -4999,7 +5171,11 @@
          const tabContainer = pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
@@ -612,7 +612,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        }
  
        if (tab.group?.collapsed) {
-@@ -5012,6 +5188,7 @@
+@@ -5014,6 +5190,7 @@
        if (pinned) {
          this._updateTabBarForPinnedTabs();
        }
@@ -620,7 +620,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        TabBarVisibility.update();
      }
-@@ -5568,6 +5745,7 @@
+@@ -5577,6 +5754,7 @@
          metricsContext,
        } = {}
      ) {
@@ -628,7 +628,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
        // can be considered equivalent to closing the window.
        if (
-@@ -5678,6 +5856,7 @@
+@@ -5687,6 +5865,7 @@
              closedTabCount -= 1;
            }
          }
@@ -636,7 +636,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
          if (closedTabCount > 0) {
            this.recordTabMetrics(
-@@ -5730,6 +5909,14 @@
+@@ -5761,6 +5940,14 @@
          return;
        }
  
@@ -651,7 +651,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        let isVisibleTab = aTab.visible;
        // We have to sample the tab width now, since _beginRemoveTab might
        // end up modifying the DOM in such a way that aTab gets a new
-@@ -5737,6 +5924,9 @@
+@@ -5768,6 +5955,9 @@
        // state).
        let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
        let isLastTab = this.#isLastTabInWindow(aTab);
@@ -661,7 +661,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (
          !this._beginRemoveTab(aTab, {
            closeWindowFastpath: true,
-@@ -5747,13 +5937,14 @@
+@@ -5778,13 +5968,14 @@
            metricsContext,
          })
        ) {
@@ -677,7 +677,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        let lockTabSizing =
          !this.tabContainer.verticalMode &&
          !aTab.pinned &&
-@@ -5784,7 +5975,13 @@
+@@ -5815,7 +6006,13 @@
          // We're not animating, so we can cancel the animation stopwatch.
          Glean.browserTabclose.timeAnim.cancel(aTab._closeTimeAnimTimerId);
          aTab._closeTimeAnimTimerId = null;
@@ -692,7 +692,18 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          return;
        }
  
-@@ -5827,7 +6024,7 @@
+@@ -5855,7 +6052,9 @@
+     get #shouldCloseWindowWithLastTab() {
+       return (
+         !window.toolbar.visible ||
+-        Services.prefs.getBoolPref("browser.tabs.closeWindowWithLastTab")
++        (Services.prefs.getBoolPref("browser.tabs.closeWindowWithLastTab") &&
++          !gZenWorkspaces._isClosingWindow &&
++          !gZenWorkspaces._removedByStartupPage)
+       );
+     }
+ 
+@@ -5871,7 +6070,7 @@
       */
      #isLastTabInWindow(tab) {
        for (const otherTab of this.tabs) {
@@ -701,16 +712,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
            return false;
          }
        }
-@@ -5917,7 +6114,7 @@
+@@ -5982,6 +6181,7 @@
-           closeWindowWithLastTab != null
-             ? closeWindowWithLastTab
-             : !window.toolbar.visible ||
--              Services.prefs.getBoolPref("browser.tabs.closeWindowWithLastTab");
-+              Services.prefs.getBoolPref("browser.tabs.closeWindowWithLastTab") && !gZenWorkspaces._isClosingWindow && !gZenWorkspaces._removedByStartupPage;
- 
-         if (closeWindow) {
-           // We've already called beforeunload on all the relevant tabs if we get here,
-@@ -5941,6 +6138,7 @@
  
          newTab = true;
        }
@@ -718,8 +720,8 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        aTab._endRemoveArgs = [closeWindow, newTab];
  
        // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -5982,13 +6180,7 @@
+@@ -6029,13 +6229,7 @@
-       aTab._mouseleave();
+       }
  
        if (newTab) {
 -        this.addTrustedTab(BROWSER_NEW_TAB_URL, {
@@ -733,7 +735,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        } else {
          TabBarVisibility.update();
        }
-@@ -6128,6 +6320,7 @@
+@@ -6192,6 +6386,7 @@
          this.tabs[i]._tPos = i;
        }
  
@@ -741,7 +743,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (!this.#windowIsClosing) {
          // update tab close buttons state
          this.tabContainer._updateCloseButtons();
-@@ -6313,6 +6506,7 @@
+@@ -6377,6 +6572,7 @@
          memory_after: await getTotalMemoryUsage(),
          time_to_unload_in_ms: timeElapsed,
        });
@@ -749,7 +751,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
      }
  
      /**
-@@ -6358,6 +6552,7 @@
+@@ -6422,6 +6618,7 @@
        }
  
        let excludeTabs = new Set(aExcludeTabs);
@@ -757,7 +759,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        // If this tab has a successor, it should be selectable, since
        // hiding or closing a tab removes that tab as a successor.
-@@ -6370,13 +6565,13 @@
+@@ -6434,13 +6631,13 @@
          !excludeTabs.has(aTab.owner) &&
          Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
        ) {
@@ -773,7 +775,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        );
  
        if (Services.prefs.getBoolPref("browser.tabs.selectMRUOnClose", false)) {
-@@ -6392,6 +6587,13 @@
+@@ -6456,6 +6653,13 @@
          }
        }
  
@@ -787,7 +789,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        let tab = this.tabContainer.findNextTab(aTab, {
          direction: 1,
          filter: _tab => remainingTabs.includes(_tab),
-@@ -6405,7 +6607,7 @@
+@@ -6469,7 +6673,7 @@
        }
  
        if (tab) {
@@ -796,7 +798,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        }
  
        // If no qualifying visible tab was found, see if there is a tab in
-@@ -6426,7 +6628,7 @@
+@@ -6490,7 +6694,7 @@
          });
        }
  
@@ -805,7 +807,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
      }
  
      _blurTab(aTab) {
-@@ -6437,7 +6639,7 @@
+@@ -6501,7 +6705,7 @@
       * @returns {boolean}
       *   False if swapping isn't permitted, true otherwise.
       */
@@ -814,7 +816,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // Do not allow transfering a private tab to a non-private window
        // and vice versa.
        if (
-@@ -6491,6 +6693,7 @@
+@@ -6555,6 +6759,7 @@
        // fire the beforeunload event in the process.  Close the other
        // window if this was its last tab.
        if (
@@ -822,7 +824,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          !remoteBrowser._beginRemoveTab(aOtherTab, {
            adoptedByTab: aOurTab,
            closeWindowWithLastTab: true,
-@@ -6502,7 +6705,7 @@
+@@ -6566,7 +6771,7 @@
        // If this is the last tab of the window, hide the window
        // immediately without animation before the docshell swap, to avoid
        // about:blank being painted.
@@ -831,7 +833,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (closeWindow) {
          let win = aOtherTab.documentGlobal;
          win.windowUtils.suppressAnimation(true);
-@@ -6636,11 +6839,13 @@
+@@ -6700,11 +6905,13 @@
        }
  
        // Finish tearing down the tab that's going away.
@@ -845,7 +847,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        this.setTabTitle(aOurTab);
  
-@@ -6860,10 +7065,10 @@
+@@ -6928,10 +7135,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      }
  
@@ -858,7 +860,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -6923,7 +7128,8 @@
+@@ -6991,7 +7198,8 @@
       * @param {object} [aOptions={}]
       *   Key-value pairs that will be serialized into the features string.
       */
@@ -868,7 +870,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        if (this.tabs.length == 1) {
          return null;
        }
-@@ -6940,7 +7146,7 @@
+@@ -7008,7 +7216,7 @@
        // tell a new window to take the "dropped" tab
        let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
        args.appendElement(aTab.splitview ?? aTab);
@@ -877,7 +879,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          private: PrivateBrowsingUtils.isWindowPrivate(window),
          features: Object.entries(aOptions)
            .map(([key, value]) => `${key}=${value}`)
-@@ -6948,6 +7154,8 @@
+@@ -7016,6 +7224,8 @@
          openerWindow: window,
          args,
        });
@@ -886,7 +888,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
      }
  
      /**
-@@ -7074,7 +7282,7 @@
+@@ -7142,7 +7352,7 @@
       *   `true` if element is a `<tab-group>`
       */
      isTabGroup(element) {
@@ -895,7 +897,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
      }
  
      /**
-@@ -7146,8 +7354,8 @@
+@@ -7214,8 +7424,8 @@
        }
  
        // Don't allow mixing pinned and unpinned tabs.
@@ -906,7 +908,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        } else {
          tabIndex = Math.max(tabIndex, this.pinnedTabCount);
        }
-@@ -7193,8 +7401,8 @@
+@@ -7261,8 +7471,8 @@
        this.#handleTabMove(
          element,
          () => {
@@ -917,7 +919,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
              neighbor = neighbor.group;
            }
            if (neighbor?.splitview) {
-@@ -7205,6 +7413,12 @@
+@@ -7273,6 +7483,12 @@
                return;
              }
            }
@@ -930,7 +932,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
            if (movingForwards && neighbor) {
              neighbor.after(element);
-@@ -7278,23 +7492,31 @@
+@@ -7346,23 +7562,31 @@
      ) {
        if (this.isTabGroupLabel(targetElement)) {
          targetElement = targetElement.group;
@@ -968,7 +970,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        } else if (!element.pinned && targetElement && targetElement.pinned) {
          // If the caller asks to move an unpinned element next to a pinned
          // tab, move the unpinned element to be the first unpinned element
-@@ -7307,12 +7529,35 @@
+@@ -7375,12 +7599,35 @@
          //    move the tab group right before the first unpinned tab.
          // 4. Moving a tab group and the first unpinned tab is grouped:
          //    move the tab group right before the first unpinned tab's tab group.
@@ -1005,7 +1007,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        // We want to include the splitview wrapper if it's the targetElement, but
        // not in the case where we want to reverse tabs within the same splitview.
-@@ -7321,6 +7566,7 @@
+@@ -7389,6 +7636,7 @@
        }
  
        let getContainer = () =>
@@ -1013,7 +1015,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          element.pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
-@@ -7329,11 +7575,15 @@
+@@ -7397,11 +7645,15 @@
          element,
          () => {
            if (moveBefore) {
@@ -1030,7 +1032,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
            }
          },
          { metricsContext }
-@@ -7411,11 +7661,15 @@
+@@ -7479,11 +7731,15 @@
       *   The context for the operation for telemetry purposes.
       */
      moveTabToExistingGroup(aTab, aGroup, { metricsContext } = {}) {
@@ -1049,7 +1051,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        }
        if (aTab.group && aTab.group.id === aGroup.id) {
          return;
-@@ -7489,6 +7743,7 @@
+@@ -7557,6 +7813,7 @@
  
        let state = {
          tabIndex: tab._tPos,
@@ -1057,7 +1059,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        };
        if (tab.visible) {
          state.elementIndex = tab.elementIndex;
-@@ -7527,7 +7782,7 @@
+@@ -7595,7 +7852,7 @@
        let changedSplitView =
          previousTabState.splitViewId != currentTabState.splitViewId;
  
@@ -1066,7 +1068,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
          tab.dispatchEvent(
            new CustomEvent("TabMove", {
              bubbles: true,
-@@ -7579,6 +7834,10 @@
+@@ -7647,6 +7904,10 @@
  
        moveActionCallback();
  
@@ -1077,7 +1079,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // Clear tabs cache after moving nodes because the order of tabs may have
        // changed.
        this.tabContainer._invalidateCachedTabs();
-@@ -7626,7 +7885,22 @@
+@@ -7694,7 +7955,22 @@
       * @returns {object}
       *    The new tab in the current window, null if the tab couldn't be adopted.
       */
@@ -1101,7 +1103,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        // Swap the dropped tab with a new one we create and then close
        // it in the other window (making it seem to have moved between
        // windows). We also ensure that the tab we create to swap into has
-@@ -7669,6 +7943,8 @@
+@@ -7737,6 +8013,8 @@
        }
        params.skipLoad = true;
        let newTab = this.addWebTab("about:blank", params);
@@ -1110,7 +1112,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
        aTab.container.tabDragAndDrop.finishAnimateTabMove();
  
-@@ -8448,7 +8724,7 @@
+@@ -8516,7 +8794,7 @@
          // preventDefault(). It will still raise the window if appropriate.
          return;
        }
@@ -1119,7 +1121,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        window.focus();
        aEvent.preventDefault();
      }
-@@ -8465,7 +8741,6 @@
+@@ -8533,7 +8811,6 @@
  
      on_TabGroupCollapse(aEvent) {
        aEvent.target.tabs.forEach(tab => {
@@ -1127,7 +1129,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
        });
      }
  
-@@ -8819,7 +9094,9 @@
+@@ -8887,7 +9164,9 @@
  
          let filter = this.#tabFilters.get(tab);
          if (filter) {
@@ -1137,7 +1139,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
  
            let listener = this.#tabListeners.get(tab);
            if (listener) {
-@@ -9604,6 +9881,7 @@
+@@ -9676,6 +9955,7 @@
              aWebProgress.isTopLevel
            ) {
              this._tab.setAttribute("busy", "true");
@@ -1145,7 +1147,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
              gBrowser._tabAttrModified(this._tab, ["busy"]);
              this._tab._notselectedsinceload = !this._tab.selected;
            }
-@@ -9684,6 +9962,7 @@
+@@ -9756,6 +10036,7 @@
          // known defaults. Note we use the original URL since about:newtab
          // redirects to a prerendered page.
          const shouldRemoveFavicon =
@@ -1153,7 +1155,7 @@ index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da
            !this._browser.mIconURL &&
            !ignoreBlank &&
            !(originalLocation.spec in FAVICON_DEFAULTS);
-@@ -9858,13 +10137,6 @@
+@@ -9930,13 +10211,6 @@
              this._browser.originalURI = aRequest.originalURI;
            }
  

src/browser/components/tabbrowser/content/tabgroup-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/tabgroup.js b/browser/components/tabbrowser/content/tabgroup.js
-index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e356c9f8c6f 100644
+index 237950fb2c449ce088c204d33a70b1d95dae549b..635f9dbc5c79b6bb869b4ab4ec2d4b4e226b4672 100644
 --- a/browser/components/tabbrowser/content/tabgroup.js
 +++ b/browser/components/tabbrowser/content/tabgroup.js
 @@ -14,11 +14,11 @@
@@ -101,7 +101,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
  
      resetDefaultGroupName = () => {
        this.#defaultGroupName = "";
-@@ -175,10 +198,15 @@
+@@ -175,10 +198,18 @@
        if (!this.#tabChangeObserver) {
          this.#tabChangeObserver = new window.MutationObserver(mutations => {
            if (!this.tabs.length) {
@@ -112,12 +112,15 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
                new CustomEvent("TabGroupRemoved", { bubbles: true })
              );
 +          gZenVerticalTabsManager.animateItemClose(this).then(() => {
++            this.dispatchEvent(
++              new CustomEvent("TabGroupRemovedFromDOM", { bubbles: true })
++            );
              this.remove();
 +          });
              Services.obs.notifyObservers(
                this,
                "browser-tabgroup-removed-from-dom"
-@@ -223,7 +251,10 @@
+@@ -223,7 +254,10 @@
            }
          });
        }
@@ -129,7 +132,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
      }
  
      get color() {
-@@ -330,6 +361,9 @@
+@@ -330,6 +364,9 @@
      }
  
      set collapsed(val) {
@@ -139,7 +142,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
        if (!!val == this.collapsed) {
          return;
        }
-@@ -416,7 +450,6 @@
+@@ -416,7 +453,6 @@
            tabGroupName,
          })
          .then(result => {
@@ -147,7 +150,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
          });
      }
  
-@@ -491,13 +524,68 @@
+@@ -491,13 +527,68 @@
       * @returns {MozTabbrowserTab[]}
       */
      get tabs() {
@@ -162,9 +165,8 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
 +        tabsCollect.push(item);
 +        if (gBrowser.isTabGroup(item)) {
 +          tabsCollect.push(...item.tabs);
-         }
++        }
-       }
++      }
--      return childrenArray.filter(node => node.matches("tab"));
 +      return tabsCollect.filter(node => node.matches("tab"));
 +    }
 +
@@ -208,8 +210,9 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
 +        currentGroup = currentGroup?.group;
 +        if (currentGroup.collapsed) {
 +          return false;
-+        }
+         }
-+      }
+       }
+-      return childrenArray.filter(node => node.matches("tab"));
 +      if (this.pinned && gZenWorkspaces.activeWorkspaceElement?.hasCollapsedPinnedTabs) {
 +        return false;
 +      }
@@ -221,7 +224,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
      }
  
      /**
-@@ -617,9 +705,6 @@
+@@ -617,9 +708,6 @@
            });
          } else {
            if (tabOrSplitView.pinned) {
@@ -231,7 +234,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
            }
            let tabToMove =
              this.documentGlobal === tabOrSplitView.documentGlobal
-@@ -682,7 +767,7 @@
+@@ -682,7 +770,7 @@
       */
      on_click(event) {
        let isToggleElement =
@@ -240,7 +243,7 @@ index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e35
          event.target === this.#overflowCountLabel;
        if (isToggleElement && event.button === 0) {
          event.preventDefault();
-@@ -761,5 +846,6 @@
+@@ -761,5 +849,6 @@
      }
    }
  

src/browser/components/urlbar/UrlbarPrefs-sys-mjs.patch

@@ -1,8 +1,18 @@
 diff --git a/browser/components/urlbar/UrlbarPrefs.sys.mjs b/browser/components/urlbar/UrlbarPrefs.sys.mjs
-index 2d21248256c6c2bfb8dac958133c10e3251ef564..f788bd10ec2c08e4b27b77cd3bb0489fb04e8b7a 100644
+index e48f0295d803ba9eac5ab9d01ebb3b3dacbc9d4b..cb78b74230f63a47479404767b5ab5883278dfba 100644
 --- a/browser/components/urlbar/UrlbarPrefs.sys.mjs
 +++ b/browser/components/urlbar/UrlbarPrefs.sys.mjs
-@@ -462,6 +462,7 @@ const PREF_URLBAR_DEFAULTS = /** @type {PreferenceDefinition[]} */ ([
+@@ -161,6 +161,9 @@ const PREF_URLBAR_DEFAULTS = /** @type {PreferenceDefinition[]} */ ([
+   // Feature gate pref for flight status suggestions in the urlbar.
+   ["flightStatus.featureGate", false],
+ 
++  // Whether to close the urlbar when blurring the window while the urlbar is focused.
++  ["closeOnWindowBlur", true],
++
+   // The minimum prefix length of a flight status keyword the user must type to
+   // trigger the suggestion. 0 means the min length should be taken from Nimbus
+   // or remote settings.
+@@ -486,6 +489,7 @@ const PREF_URLBAR_DEFAULTS = /** @type {PreferenceDefinition[]} */ ([
    ["shortcuts.tabs", true],
    ["shortcuts.history", true],
    ["shortcuts.actions", true],
@@ -10,12 +20,12 @@ index 2d21248256c6c2bfb8dac958133c10e3251ef564..f788bd10ec2c08e4b27b77cd3bb0489f
  
    // Boolean to determine if the providers defined in `exposureResults`
    // should be displayed in search results. This can be set by a
-@@ -799,6 +800,8 @@ function makeDefaultResultGroups({ showSearchSuggestionsFirst }) {
+@@ -854,6 +858,8 @@ function makeDefaultResultGroups({
     */
    let rootGroup = {
      children: [
-+      { children: [{ group: lazy.UrlbarUtils.RESULT_GROUP.ZEN_ACTION }] },
++      { children: [{ group: lazy.UrlbarShared.RESULT_GROUP.ZEN_ACTION }] },
-+      { children: [{ group: lazy.UrlbarUtils.RESULT_GROUP.ZEN_WORKSPACE }] },
++      { children: [{ group: lazy.UrlbarShared.RESULT_GROUP.ZEN_WORKSPACE }] },
        // heuristic
        {
          maxResultCount: 1,

src/browser/components/urlbar/UrlbarProviderHeuristicFallback-sys-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/urlbar/UrlbarProviderHeuristicFallback.sys.mjs b/browser/components/urlbar/UrlbarProviderHeuristicFallback.sys.mjs
-index f611d8e44af518aa1adc7505c5021235f55b49de..0eca20cb869626dfa6ace02acc00cad84462d54f 100644
+index cfc232f038cd491db32e0c0ca35622360dd9dec5..4806a725ddefa9d0709020d537eae5464249a294 100644
 --- a/browser/components/urlbar/UrlbarProviderHeuristicFallback.sys.mjs
 +++ b/browser/components/urlbar/UrlbarProviderHeuristicFallback.sys.mjs
-@@ -78,22 +78,26 @@ export class UrlbarProviderHeuristicFallback extends UrlbarProvider {
+@@ -77,22 +77,26 @@ export class UrlbarProviderHeuristicFallback extends UrlbarProvider {
          // Since we can't tell if this is a real URL and whether the user wants
          // to visit or search for it, we provide an alternative searchengine
          // match if the string looks like an alphanumeric origin or an e-mail.
@@ -17,7 +17,7 @@ index f611d8e44af518aa1adc7505c5021235f55b49de..0eca20cb869626dfa6ace02acc00cad8
 -              lazy.UrlUtils.REGEXP_COMMON_EMAIL.test(str))
 -          ) {
 +        let trimmedSearchString = queryContext.trimmedSearchString;
-+        let [searchCandidate] = UrlbarUtils.stripPrefixAndTrim(
++        let [searchCandidate] = lazy.UrlbarShared.stripPrefixAndTrim(
 +          trimmedSearchString,
 +          {
 +            trimSlash: true,

src/browser/components/urlbar/UrlbarUtils-sys-mjs.patch

@@ -1,41 +1,16 @@
 diff --git a/browser/components/urlbar/UrlbarUtils.sys.mjs b/browser/components/urlbar/UrlbarUtils.sys.mjs
-index 78c76bde00b6b581184cee1cd0e1756e5f2da6a4..94c713470b1240729ef2350d090b0449f3801af4 100644
+index 178cd5e84fda74a28b2de59b671b3399cc28fac4..b03c6e06de4ee9a95dcb4d33d7ac9f0b053be4e1 100644
 --- a/browser/components/urlbar/UrlbarUtils.sys.mjs
 +++ b/browser/components/urlbar/UrlbarUtils.sys.mjs
-@@ -126,6 +126,8 @@ export var UrlbarUtils = {
+@@ -214,6 +214,11 @@ export var UrlbarUtils = {
-     SEMANTIC_HISTORY: "semanticHistory",
+           return UrlbarShared.RESULT_GROUP.HEURISTIC_FALLBACK;
-     SUGGESTED_INDEX: "suggestedIndex",
-     TAIL_SUGGESTION: "tailSuggestion",
-+    ZEN_ACTION: "zenAction",
-+    ZEN_WORKSPACE: "zenWorkspace",
-   }),
- 
-   // Defines provider types.
-@@ -274,6 +276,14 @@ export var UrlbarUtils = {
-         telemetryLabel: "actions",
-         uiLabel: "urlbar-searchmode-actions3",
-       },
-+      {
-+        source: UrlbarShared.RESULT_SOURCE.WORKSPACES,
-+        restrict: UrlbarShared.RESTRICT_TOKENS.WORKSPACE,
-+        icon: "chrome://browser/skin/zen-icons/selectable/layers.svg",
-+        pref: "shortcuts.workspaces",
-+        telemetryLabel: "workspaces",
-+        uiLabel: "urlbar-search-mode-workspaces",
-+      },
-     ]);
-   },
- 
-@@ -566,6 +576,12 @@ export var UrlbarUtils = {
-           return this.RESULT_GROUP.HEURISTIC_FALLBACK;
          case "UrlbarProviderHistoryUrlHeuristic":
-           return this.RESULT_GROUP.HEURISTIC_HISTORY_URL;
+           return UrlbarShared.RESULT_GROUP.HEURISTIC_HISTORY_URL;
 +        case "ZenUrlbarProviderGlobalActions":
 +          if (result.source == UrlbarShared.RESULT_SOURCE.WORKSPACES) {
-+            return this.RESULT_GROUP.ZEN_WORKSPACE;
++            return UrlbarShared.RESULT_GROUP.ZEN_WORKSPACE;
-+          } else {
-+            return this.RESULT_GROUP.ZEN_ACTION;
 +          }
++          return UrlbarShared.RESULT_GROUP.ZEN_ACTION;
          case "UrlbarProviderOmnibox":
-           return this.RESULT_GROUP.HEURISTIC_OMNIBOX;
+           return UrlbarShared.RESULT_GROUP.HEURISTIC_OMNIBOX;
          case "UrlbarProviderRestrictKeywordsAutofill":

src/browser/components/urlbar/content/UrlbarChildController-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/urlbar/content/UrlbarChildController.mjs b/browser/components/urlbar/content/UrlbarChildController.mjs
-index a8e9d3093d046612650a17970330a8279f55833f..063a3e8adf009d6c0ddc60430bc0e7485e812b8a 100644
+index a17a4de079b69d2818388b33a2c1746cc6148c73..4fee63a22919972af08716db2d2de1c7549ff100 100644
 --- a/browser/components/urlbar/content/UrlbarChildController.mjs
 +++ b/browser/components/urlbar/content/UrlbarChildController.mjs
-@@ -258,7 +258,6 @@ export class UrlbarChildController {
+@@ -438,7 +438,6 @@ export class UrlbarChildController {
      const isMac = AppConstants.platform == "macosx";
      // Handle readline/emacs-style navigation bindings on Mac.
      if (
@@ -10,7 +10,7 @@ index a8e9d3093d046612650a17970330a8279f55833f..063a3e8adf009d6c0ddc60430bc0e748
        this.view.isOpen &&
        event.ctrlKey &&
        (event.key == "n" || event.key == "p")
-@@ -450,6 +449,8 @@ export class UrlbarChildController {
+@@ -630,6 +629,8 @@ export class UrlbarChildController {
              });
            }
            event.preventDefault();
@@ -19,3 +19,25 @@ index a8e9d3093d046612650a17970330a8279f55833f..063a3e8adf009d6c0ddc60430bc0e748
          }
          break;
        }
+@@ -934,6 +935,10 @@ export class UrlbarChildController {
+       }
+       reuseEmpty = true;
+     }
++    if (this.#input.hasAttribute?.("zen-newtab")) {
++      where = "tab";
++      reuseEmpty = true;
++    }
+     // The browser window exists only in chrome; a content-process input has no
+     // tab to reuse, so `gBrowser` is absent and the reuse is skipped.
+     if (
+@@ -943,6 +948,10 @@ export class UrlbarChildController {
+     ) {
+       where = "current";
+     }
++    if (this.window.gBrowser?.selectedTab.hasAttribute("zen-empty-tab")) {
++      // Always open in a new tab if the current tab is our empty tab.
++      return "tab";
++    }
+     return where;
+   }
+ 

src/browser/components/urlbar/content/UrlbarInput-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/urlbar/content/UrlbarInput.mjs b/browser/components/urlbar/content/UrlbarInput.mjs
-index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a6182579cbaf4d 100644
+index 319fb6870ec18d87b9f1263bd960edaa39b0447c..554cc90fb2307450ddc68033968cefd1a95e28b8 100644
 --- a/browser/components/urlbar/content/UrlbarInput.mjs
 +++ b/browser/components/urlbar/content/UrlbarInput.mjs
-@@ -101,6 +101,13 @@ const lazy = XPCOMUtils.declareLazy({
+@@ -88,6 +88,13 @@ const lazy = XPCOMUtils.declareLazy({
    logger: () => UrlbarShared.getLogger({ prefix: "Input" }),
  });
  
@@ -16,7 +16,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
  const UNLIMITED_MAX_RESULTS = 99;
  
  let getBoundsWithoutFlushing = element =>
-@@ -769,7 +776,16 @@ ${
+@@ -771,7 +778,16 @@ ${
      // See _on_select().  HTMLInputElement.select() dispatches a "select"
      // event but does not set the primary selection.
      this._suppressPrimaryAdjustment = true;
@@ -33,7 +33,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      this._suppressPrimaryAdjustment = false;
    }
  
-@@ -843,6 +859,10 @@ ${
+@@ -846,6 +862,10 @@ ${
      hideSearchTerms = false,
      isSameDocument = false,
    } = {}) {
@@ -44,7 +44,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      if (!this.#isAddressbar) {
        throw new Error(
          "Cannot set URI for UrlbarInput that is not an address bar"
-@@ -1137,7 +1157,16 @@ ${
+@@ -1143,7 +1163,16 @@ ${
        this.searchModeSwitcher?.updateSearchIcon();
      }
  
@@ -61,7 +61,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
    }
  
    /**
-@@ -1626,7 +1655,11 @@ ${
+@@ -1726,7 +1755,11 @@ ${
      openParams.avoidBrowserFocus = keepViewOpen;
  
      if (!this.#providesSearchMode(result) && !keepViewOpen) {
@@ -74,7 +74,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      }
  
      if (isCanonized) {
-@@ -2974,6 +3007,42 @@ ${
+@@ -3016,6 +3049,42 @@ ${
      await this.#updateLayoutBreakoutDimensions();
    }
  
@@ -117,7 +117,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
    startLayoutExtend() {
      if (!this.#allowBreakout || this.hasAttribute("breakout-extend")) {
        // Do not expand if the Urlbar does not support being expanded or it is
-@@ -2988,6 +3057,13 @@ ${
+@@ -3030,6 +3099,13 @@ ${
      this.toggleAttribute("breakout-extend", true);
      this.#updateTextboxPosition();
  
@@ -131,7 +131,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      // Enable the animation only after the first extend call to ensure it
      // doesn't run when opening a new window.
      if (!this.hasAttribute("breakout-extend-animate")) {
-@@ -3011,6 +3087,29 @@ ${
+@@ -3053,6 +3129,29 @@ ${
        return;
      }
  
@@ -161,7 +161,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      this.toggleAttribute("breakout-extend", false);
      this.#updateTextboxPosition();
    }
-@@ -3049,7 +3148,7 @@ ${
+@@ -3091,7 +3190,7 @@ ${
      forceUnifiedSearchButtonAvailable = false
    ) {
      let prevState = this.getAttribute("pageproxystate");
@@ -170,7 +170,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      this.setAttribute("pageproxystate", state);
      this._inputContainer.setAttribute("pageproxystate", state);
      this._identityBox?.setAttribute("pageproxystate", state);
-@@ -3332,10 +3431,12 @@ ${
+@@ -3355,10 +3454,12 @@ ${
      }
  
      this.style.top = px(
@@ -183,7 +183,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      );
    }
  
-@@ -3394,9 +3495,10 @@ ${
+@@ -3417,9 +3518,10 @@ ${
            return;
          }
  
@@ -193,9 +193,9 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
 -          px(getBoundsWithoutFlushing(this.parentNode).height)
 +          px(getBoundsWithoutFlushing(this.parentNode).height + 8)
          );
-         this.style.setProperty(
+ 
-           "--urlbar-height",
+         if (this.#breakoutBlockerCount) {
-@@ -3902,6 +4004,7 @@ ${
+@@ -3929,6 +4031,7 @@ ${
    }
  
    _toggleActionOverride(event) {
@@ -203,47 +203,33 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      if (
        event.keyCode == KeyEvent.DOM_VK_SHIFT ||
        event.keyCode == KeyEvent.DOM_VK_ALT ||
-@@ -4014,8 +4117,8 @@ ${
+@@ -4027,9 +4130,10 @@ ${
      if (!this.#isAddressbar) {
        return val;
      }
--    let trimmedValue = lazy.UrlbarPrefs.get("trimURLs")
+-    let trimmedValue = UrlbarPrefs.get("trimURLs")
 -      ? lazy.BrowserUIUtils.trimURL(val)
-+    let trimmedValue = lazy.UrlbarPrefs.get("trimURLs") && this._zenTrimURL
+-      : val;
++    let trimmedValue =
++      UrlbarPrefs.get("trimURLs") && this._zenTrimURL
 +        ? this._zenTrimURL(val)
-       : val;
++        : val;
      // Only trim value if the directionality doesn't change to RTL and we're not
      // showing a strikeout https protocol.
-@@ -4317,6 +4420,7 @@ ${
+     return this.controller.isTextDirectionRTL(trimmedValue) ||
-     browser = this.window.gBrowser.selectedBrowser,
+@@ -4235,6 +4339,11 @@ ${
-     keepViewOpen = false
+     keepViewOpen = false,
-   ) {
+     browserId = null,
-+    openUILinkWhere = this.window.gZenUIManager.getOpenUILinkWhere(url, browser, openUILinkWhere);
+   }) {
-     if (this.#isAddressbar) {
++    where = this.window.gZenUIManager.getOpenUILinkWhere(
-       this.#prepareAddressbarLoad(
++      url,
-         url,
++      this.window.gBrowser.selectedBrowser,
-@@ -4430,6 +4534,10 @@ ${
++      where
-       }
++    );
-       reuseEmpty = true;
+     let userTypedValue;
-     }
+     if (this.#isAddressbar && where == "current") {
-+    if (this.hasAttribute("zen-newtab")) {
+       // Make sure URL is formatted properly (don't show punycode).
-+      where = "tab";
+@@ -4576,6 +4685,7 @@ ${
-+      reuseEmpty = true;
-+    }
-     if (
-       where == "tab" &&
-       reuseEmpty &&
-@@ -4437,6 +4545,9 @@ ${
-     ) {
-       where = "current";
-     }
-+    if (this.window.gBrowser.selectedTab.hasAttribute("zen-empty-tab")) {
-+      return "tab"; // Always open in a new tab if the current tab is "our empty tab".
-+    }
-     return where;
-   }
- 
-@@ -4691,6 +4802,7 @@ ${
        this.setResultForCurrentValue(null);
        this.handleCommand();
        this.controller.clearLastQueryContextCache();
@@ -251,7 +237,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
  
        this._suppressStartQuery = false;
      });
-@@ -4698,7 +4810,6 @@ ${
+@@ -4583,7 +4693,6 @@ ${
      contextMenu.addEventListener("popupshowing", () => {
        // Close the results pane when the input field contextual menu is open,
        // because paste and go doesn't want a result selection.
@@ -259,7 +245,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
  
        let controller =
          this.document.commandDispatcher.getControllerForCommand("cmd_paste");
-@@ -4979,7 +5090,11 @@ ${
+@@ -4850,7 +4959,11 @@ ${
      if (!engineName && !source && !this.hasAttribute("searchmode")) {
        return;
      }
@@ -272,7 +258,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      if (this._searchModeIndicatorTitle) {
        this._searchModeIndicatorTitle.textContent = "";
        this._searchModeIndicatorTitle.removeAttribute("data-l10n-id");
-@@ -5297,6 +5412,7 @@ ${
+@@ -5149,6 +5262,7 @@ ${
  
      this.document.l10n.setAttributes(
        this.inputField,
@@ -280,7 +266,20 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
        l10nId,
        l10nId == "urlbar-placeholder-with-name"
          ? { name: engineName }
-@@ -5424,6 +5540,11 @@ ${
+@@ -5199,6 +5313,12 @@ ${
+     }
+ 
+     lazy.logger.debug("Blur Event");
++    if (
++      this.document.commandDispatcher.focusedElement == this.inputField &&
++      !UrlbarPrefs.get("closeOnWindowBlur")
++    ) {
++      return;
++    }
+     // We cannot count every blur events after a missed engagement as abandoment
+     // because the user may have clicked on some view element that executes
+     // a command causing a focus change. For example opening preferences from
+@@ -5276,6 +5396,11 @@ ${
    }
  
    _on_click(event) {
@@ -292,7 +291,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
      switch (event.target) {
        case this.inputField:
        case this._inputContainer:
-@@ -5513,10 +5634,11 @@ ${
+@@ -5371,10 +5496,11 @@ ${
        }
        if (untrim) {
          this.setValue(this._untrimmedValue);
@@ -305,7 +304,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
        this.view.autoOpen({ event });
      } else {
        if (this._untrimOnFocusAfterKeydown) {
-@@ -5556,9 +5678,16 @@ ${
+@@ -5414,9 +5540,16 @@ ${
    }
  
    _on_mousedown(event) {
@@ -323,7 +322,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
          if (
            event.composedTarget != this.inputField &&
            event.composedTarget != this._inputContainer
-@@ -5568,6 +5697,10 @@ ${
+@@ -5426,6 +5559,10 @@ ${
  
          this.focusedViaMousedown = !this.focused;
          this.#preventClickSelectsAll = this.focused;
@@ -334,7 +333,7 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
  
          // Keep the focus status, since the attribute may be changed
          // upon calling this.focus().
-@@ -5605,7 +5738,7 @@ ${
+@@ -5463,7 +5600,7 @@ ${
          // view open on tab switch, and the TabSelect event arrived earlier.
          // Also ignore mousedown on the urlbarView context menu: opening/closing the
          // view is already handled by the result opening flow.
@@ -343,12 +342,12 @@ index e7e9495e56076cd112beafb8297dece4ae4cea58..330104d245ddd0956b95377082a61825
            break;
          }
  
-@@ -5894,7 +6027,7 @@ ${
+@@ -5754,7 +5891,7 @@ ${
      // When we are in actions search mode we can show more results so
      // increase the limit.
      let maxResults =
 -      this.searchMode?.source != UrlbarShared.RESULT_SOURCE.ACTIONS
 +      this.searchMode?.source != UrlbarShared.RESULT_SOURCE.ZEN_ACTIONS
-         ? lazy.UrlbarPrefs.get("maxRichResults")
+         ? UrlbarPrefs.get("maxRichResults")
          : UNLIMITED_MAX_RESULTS;
      let options = {

src/browser/components/urlbar/content/UrlbarShared-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/urlbar/content/UrlbarShared.mjs b/browser/components/urlbar/content/UrlbarShared.mjs
-index 5b45afb747bfcdbd06782186737669aa2c4c634d..f68bd009f70415b5fb513abdfe19b4427ceefbfc 100644
+index 4e67dad66ae006842abc6eed547e4a244320d57a..393b61b4d2543c73e60afd334a353f36119ae73e 100644
 --- a/browser/components/urlbar/content/UrlbarShared.mjs
 +++ b/browser/components/urlbar/content/UrlbarShared.mjs
-@@ -47,6 +47,7 @@ export const UrlbarShared = {
+@@ -100,6 +100,7 @@ export const UrlbarShared = {
      // `looksLikeOrigin()` returned `LOOKS_LIKE_ORIGIN.OTHER` for this token.
      // It may or may not be an origin.
      POSSIBLE_ORIGIN_BUT_SEARCH_ALLOWED: 12,
@@ -10,7 +10,7 @@ index 5b45afb747bfcdbd06782186737669aa2c4c634d..f68bd009f70415b5fb513abdfe19b442
    }),
  
    /**
-@@ -67,6 +68,7 @@ export const UrlbarShared = {
+@@ -120,6 +121,7 @@ export const UrlbarShared = {
      TITLE: "#",
      URL: "$",
      ACTION: ">",
@@ -18,7 +18,7 @@ index 5b45afb747bfcdbd06782186737669aa2c4c634d..f68bd009f70415b5fb513abdfe19b442
    }),
  
    // Defines UrlbarResult types.
-@@ -112,6 +114,8 @@ export const UrlbarShared = {
+@@ -165,6 +167,8 @@ export const UrlbarShared = {
      OTHER_NETWORK: 6,
      ADDON: 7,
      ACTIONS: 8,
@@ -26,9 +26,33 @@ index 5b45afb747bfcdbd06782186737669aa2c4c634d..f68bd009f70415b5fb513abdfe19b442
 +    WORKSPACES: 10,
    }),
  
-   /**
+   // Results are categorized into groups to help the muxer compose them.  See
-@@ -128,6 +132,7 @@ export const UrlbarShared = {
+@@ -200,6 +204,8 @@ export const UrlbarShared = {
-     if (lazy.UrlbarPrefs.get("scotchBonnet.enableOverride")) {
+     SEMANTIC_HISTORY: "semanticHistory",
+     SUGGESTED_INDEX: "suggestedIndex",
+     TAIL_SUGGESTION: "tailSuggestion",
++    ZEN_ACTION: "zenAction",
++    ZEN_WORKSPACE: "zenWorkspace",
+   }),
+ 
+   // Defines provider types.
+@@ -385,6 +391,14 @@ export const UrlbarShared = {
+         telemetryLabel: "actions",
+         uiLabel: "urlbar-searchmode-actions3",
+       },
++      {
++        source: this.RESULT_SOURCE.WORKSPACES,
++        restrict: this.RESTRICT_TOKENS.WORKSPACE,
++        icon: "chrome://browser/skin/zen-icons/selectable/layers.svg",
++        pref: "shortcuts.workspaces",
++        telemetryLabel: "workspaces",
++        uiLabel: "urlbar-search-mode-workspaces",
++      },
+     ]);
+   },
+ 
+@@ -402,6 +416,7 @@ export const UrlbarShared = {
+     if (UrlbarPrefs.get("scotchBonnet.enableOverride")) {
        keys.push(this.RESTRICT_TOKENS.ACTION);
      }
 +    keys.push(this.RESTRICT_TOKENS.WORKSPACE);

src/browser/components/urlbar/content/UrlbarView-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/urlbar/content/UrlbarView.mjs b/browser/components/urlbar/content/UrlbarView.mjs
-index 8afb2bf4a757b3ef7902f5a6e6eed6b70ca2845e..440dea1e66540ca1998cb7464b6695ac823fedcb 100644
+index 9a2c787cfa4d70bd587d49e017075f905c90f626..1c3b341e5d520ec9541c4021aaedce98751b6993 100644
 --- a/browser/components/urlbar/content/UrlbarView.mjs
 +++ b/browser/components/urlbar/content/UrlbarView.mjs
-@@ -674,7 +674,7 @@ export class UrlbarView {
+@@ -822,7 +822,7 @@ export class UrlbarView {
        !this.input.value ||
        this.input.getAttribute("pageproxystate") == "valid"
      ) {
@@ -11,7 +11,7 @@ index 8afb2bf4a757b3ef7902f5a6e6eed6b70ca2845e..440dea1e66540ca1998cb7464b6695ac
          // Try to reuse the cached top-sites context. If it's not cached, then
          // there will be a gap of time between when the input is focused and
          // when the view opens that can be perceived as flicker.
-@@ -812,10 +812,6 @@ export class UrlbarView {
+@@ -963,10 +963,6 @@ export class UrlbarView {
      }
  
      // If search mode isn't active, close the view.
@@ -22,7 +22,7 @@ index 8afb2bf4a757b3ef7902f5a6e6eed6b70ca2845e..440dea1e66540ca1998cb7464b6695ac
  
      // Search mode is active.  If the one-offs should be shown, make sure they
      // are enabled and show the view.
-@@ -3031,6 +3027,8 @@ export class UrlbarView {
+@@ -3306,6 +3302,8 @@ export class UrlbarView {
        if (row?.hasAttribute("row-selectable")) {
          row?.toggleAttribute("selected", true);
        }
@@ -31,7 +31,7 @@ index 8afb2bf4a757b3ef7902f5a6e6eed6b70ca2845e..440dea1e66540ca1998cb7464b6695ac
        if (element != row) {
          row?.toggleAttribute("descendant-selected", true);
        }
-@@ -3544,7 +3542,7 @@ export class UrlbarView {
+@@ -3972,7 +3970,7 @@ export class UrlbarView {
    }
  
    #enableOrDisableRowWrap() {
@@ -40,3 +40,16 @@ index 8afb2bf4a757b3ef7902f5a6e6eed6b70ca2845e..440dea1e66540ca1998cb7464b6695ac
      this.#rows.toggleAttribute("wrap", wrap);
      this.oneOffSearchButtons?.container.toggleAttribute("wrap", wrap);
    }
+@@ -4387,6 +4385,12 @@ export class UrlbarView {
+   }
+ 
+   on_blur() {
++    if (
++      this.document.commandDispatcher.focusedElement == this.input.inputField &&
++      !UrlbarPrefs.get("closeOnWindowBlur")
++    ) {
++      return;
++    }
+     // If the view is open without the input being focused, it will not close
+     // automatically when the window loses focus. We might be in this state
+     // after a Search Tip is shown on an engine homepage.

src/browser/installer/windows/nsis/shared-nsh.patch

@@ -0,0 +1,124 @@
+diff --git a/browser/installer/windows/nsis/shared.nsh b/browser/installer/windows/nsis/shared.nsh
+index b81c7ef59be0d25f67668215028008a451860df2..fa0ab8947e011289d25158cab17ff9388b5cab0d 100755
+--- a/browser/installer/windows/nsis/shared.nsh
++++ b/browser/installer/windows/nsis/shared.nsh
+@@ -873,50 +873,87 @@ FunctionEnd
+ !ifdef MOZ_MAINTENANCE_SERVICE
+ ; Adds maintenance service certificate keys for the install dir.
+ ; For the cert to work, it must also be signed by a trusted cert for the user.
++; Writes this application's allowed certificate values into _KEY, which must be
++; a maintenance service registry path such as the one returned by
++; ServicesHelper::PathToUniqueRegistryPath.
++!macro AddMaintCertKeyValues _KEY
++  ; PrefetchProcessName was originally used to experiment with deleting
++  ; Windows prefetch as a speed optimization.  It is no longer used though.
++  DeleteRegValue HKLM "${_KEY}" "prefetchProcessName"
++
++  ; Setting the Attempted value will ensure that a new Maintenance Service
++  ; install will never be attempted again after this from updates.  The value
++  ; is used only to see if updates should attempt new service installs.
++  WriteRegDWORD HKLM "Software\Mozilla\MaintenanceService" "Attempted" 1
++
++  ; More than one certificate can be specified in a different subfolder
++  ; for example: ${_KEY}\1, but each individual binary can be signed
++  ; with at most one certificate.  A fallback certificate can only be used
++  ; if the binary is replaced with a different certificate.
++  WriteRegStr HKLM "${_KEY}\0" "name" "${CERTIFICATE_NAME}"
++  WriteRegStr HKLM "${_KEY}\0" "issuer" "${CERTIFICATE_ISSUER}"
++  ; These values associate the allowed certificates for the previous
++  ;  installation, so that we can update from it cleanly using the
++  ;  old updater.exe (which will still have this signature).
++  WriteRegStr HKLM "${_KEY}\1" "name" "${CERTIFICATE_NAME_PREVIOUS}"
++  WriteRegStr HKLM "${_KEY}\1" "issuer" "${CERTIFICATE_ISSUER_PREVIOUS}"
++  ClearErrors
++!macroend
++
+ !macro AddMaintCertKeys
+   Push $R0
+   ; Allow main Mozilla cert information for updates
+   ; This call will push the needed key on the stack
+   ServicesHelper::PathToUniqueRegistryPath "$INSTDIR"
+   Pop $R0
++  Push $R1
++  Push $R2
++  Push $R3
++  ; We always use the 64bit registry for certs.
++  ${If} ${RunningX64}
++  ${OrIf} ${IsNativeARM64}
++    SetRegView 64
++  ${EndIf}
++
+   ${If} $R0 != ""
+-    ; More than one certificate can be specified in a different subfolder
+-    ; for example: $R0\1, but each individual binary can be signed
+-    ; with at most one certificate.  A fallback certificate can only be used
+-    ; if the binary is replaced with a different certificate.
+-    ; We always use the 64bit registry for certs.
+-    ${If} ${RunningX64}
+-    ${OrIf} ${IsNativeARM64}
+-      SetRegView 64
+-    ${EndIf}
++    !insertmacro AddMaintCertKeyValues "$R0"
++  ${Else}
++    ; ServicesHelper could not be loaded.  This happens when PostUpdate is run
++    ; by the updater, which launches it with an environment too minimal for
++    ; NSIS to load its plugins, leaving the unique registry path uncomputable.
++    ; Fall back to refreshing every key that already records one of our own
++    ; certificate names, so that any installation of this application is kept
++    ; current rather than only the first one found.  Keys belonging to other
++    ; applications record a different name and are left alone.
++    StrCpy $R1 0
++    ${Do}
++      EnumRegKey $R2 HKLM "Software\Mozilla\MaintenanceService" $R1
++      ${If} $R2 == ""
++        ${ExitDo}
++      ${EndIf}
++      ReadRegStr $R3 HKLM "Software\Mozilla\MaintenanceService\$R2\0" "name"
++      ${If} $R3 == "${CERTIFICATE_NAME}"
++      ${OrIf} $R3 == "${CERTIFICATE_NAME_PREVIOUS}"
++        StrCpy $R0 "Software\Mozilla\MaintenanceService\$R2"
++        !insertmacro AddMaintCertKeyValues "$R0"
++      ${EndIf}
++      IntOp $R1 $R1 + 1
++    ${Loop}
++    StrCpy $R0 ""
++  ${EndIf}
+ 
+-    ; PrefetchProcessName was originally used to experiment with deleting
+-    ; Windows prefetch as a speed optimization.  It is no longer used though.
+-    DeleteRegValue HKLM "$R0" "prefetchProcessName"
+-
+-    ; Setting the Attempted value will ensure that a new Maintenance Service
+-    ; install will never be attempted again after this from updates.  The value
+-    ; is used only to see if updates should attempt new service installs.
+-    WriteRegDWORD HKLM "Software\Mozilla\MaintenanceService" "Attempted" 1
+-
+-    ; These values associate the allowed certificates for the current
+-    ; installation.
+-    WriteRegStr HKLM "$R0\0" "name" "${CERTIFICATE_NAME}"
+-    WriteRegStr HKLM "$R0\0" "issuer" "${CERTIFICATE_ISSUER}"
+-    ; These values associate the allowed certificates for the previous
+-    ;  installation, so that we can update from it cleanly using the
+-    ;  old updater.exe (which will still have this signature).
+-    WriteRegStr HKLM "$R0\1" "name" "${CERTIFICATE_NAME_PREVIOUS}"
+-    WriteRegStr HKLM "$R0\1" "issuer" "${CERTIFICATE_ISSUER_PREVIOUS}"
+-    ${If} ${RunningX64}
+-    ${OrIf} ${IsNativeARM64}
+-      SetRegView lastused
+-    ${EndIf}
+-    ClearErrors
++  ${If} ${RunningX64}
++  ${OrIf} ${IsNativeARM64}
++    SetRegView lastused
+   ${EndIf}
++
++  Pop $R3
++  Pop $R2
++  Pop $R1
+   ; Restore the previously used value back
+   Pop $R0
+ !macroend
++
+ !define AddMaintCertKeys "!insertmacro AddMaintCertKeys"
+ !endif
+ 

src/browser/installer/windows/nsis/uninstaller-nsi.patch

@@ -1,9 +1,18 @@
 diff --git a/browser/installer/windows/nsis/uninstaller.nsi b/browser/installer/windows/nsis/uninstaller.nsi
 old mode 100755
 new mode 100644
-index becbb0f70c84eb7f2d9bff5a3aedcbb7a78a61cf..05835d2088ab631316a25a9f0728898bd7998d8d
+index becbb0f70c84eb7f2d9bff5a3aedcbb7a78a61cf..a23a8a1b160932368377fc841b501df9355918db
 --- a/browser/installer/windows/nsis/uninstaller.nsi
 +++ b/browser/installer/windows/nsis/uninstaller.nsi
+@@ -150,7 +150,7 @@ OutFile "helper.exe"
+ !endif
+ ShowUnInstDetails nevershow
+ 
+-!define URLUninstallSurvey "https://qsurvey.mozilla.com/s3/FF-Desktop-Post-Uninstall?channel=${UpdateChannel}&version=${AppVersion}&osversion="
++!define URLUninstallSurvey "https://links.zen-browser.app/uninstall-feedback?osversion="
+ 
+ ; Support for the profile refresh feature
+ !define URLProfileRefreshHelp "https://support.mozilla.org/kb/refresh-firefox-reset-add-ons-and-settings"
 @@ -516,6 +516,7 @@ Section "Uninstall"
    ${un.RegCleanFileHandler}  ".svg"   "FirefoxHTML-$AppUserModelID"
    ${un.RegCleanFileHandler}  ".webp"  "FirefoxHTML-$AppUserModelID"

src/browser/themes/linux/browser-css.patch

@@ -1,11 +1,11 @@
 diff --git a/browser/themes/linux/browser.css b/browser/themes/linux/browser.css
-index e735ec80b56e1a2da4bc5bec29136ce60353277b..330ea62d220d9acd96a95a605888839388e97452 100644
+index f276db1d456703493ee713370691352985021708..619ee6724eec1e6a25adcb257af0d02eb7a29d34 100644
 --- a/browser/themes/linux/browser.css
 +++ b/browser/themes/linux/browser.css
 @@ -14,7 +14,6 @@
      @media (-moz-gtk-theme-family) {
        --tabs-navbar-separator-style: none;
-       @media (prefers-color-scheme: light) and (not -moz-pref("browser.nova.enabled")) {
+       @media (prefers-color-scheme: light) {
 -        --urlbar-box-background-color: #fafafa;
        }
      }

src/browser/themes/shared/preferences/zen-preferences.css

@@ -40,7 +40,7 @@ html|dialog {
 }
 
 groupbox button {
-  border-radius: 5px !important;
+  border-radius: calc(5px * var(--zen-squircle-value)) !important;
 }
 
 groupbox button,

src/browser/themes/shared/tabbrowser/content-area-css.patch

@@ -1,16 +1,16 @@
 diff --git a/browser/themes/shared/tabbrowser/content-area.css b/browser/themes/shared/tabbrowser/content-area.css
-index 3acdec2b8e043fe27919cfa54e73f4d3c491bfc8..267a1087134464a8193a824a2d7f8ac15ff8ad60 100644
+index 2374ed38bd9361d6c7e1886117099c6761e403b8..72f1f52a13096f19ca4009037ad0cdc880775ff7 100644
 --- a/browser/themes/shared/tabbrowser/content-area.css
 +++ b/browser/themes/shared/tabbrowser/content-area.css
-@@ -157,7 +157,6 @@
+@@ -239,7 +239,6 @@
-   min-height: 0;
+   min-width: 0;
  
    /* We want to be able to show the frame color behind the clipped radiused corner */
 -  background: var(--tabpanel-background-color);
  
-   @media -moz-pref("sidebar.revamp") {
+   display: grid;
-     outline: 0.01px solid var(--chrome-content-separator-color);
+   /**
-@@ -216,7 +215,6 @@
+@@ -425,7 +424,6 @@
    }
  
    browser:is([blank], [pendingpaint]) {
@@ -18,7 +18,7 @@ index 3acdec2b8e043fe27919cfa54e73f4d3c491bfc8..267a1087134464a8193a824a2d7f8ac1
    }
  
    /* Exclude browsers with smartwindow-content attribute which inherit
-@@ -553,7 +551,7 @@ split-view-footer {
+@@ -865,7 +863,7 @@ split-view-footer {
  
  .dialogStack {
    z-index: var(--browser-stack-z-index-dialog-stack);
@@ -27,12 +27,12 @@ index 3acdec2b8e043fe27919cfa54e73f4d3c491bfc8..267a1087134464a8193a824a2d7f8ac1
    inset: 0;
    /* --browser-with-dialog set on browser[tabDialogShowing], we want to position the overlay
       only on the top of the <browser> element so it doesn't overlap the DevTools toolbox */
-@@ -718,7 +716,7 @@ split-view-footer {
+@@ -1034,7 +1032,7 @@ split-view-footer {
  
  .dialogOverlay[topmost="true"],
  #window-modal-dialog::backdrop {
 -  background-color: var(--background-color-overlay);
 +  background-color: light-dark(rgba(255, 255, 255, .3), rgba(0, 0, 0, .3));
- }
+   border-radius: var(--chrome-block-radius);
  
- .dialogOverlay[hideContent="true"][topmost="true"] {
+   .browserSidebarContainer.responsive-mode & {

src/browser/themes/shared/tabbrowser/tabs-css.patch

@@ -1,17 +1,17 @@
 diff --git a/browser/themes/shared/tabbrowser/tabs.css b/browser/themes/shared/tabbrowser/tabs.css
-index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f253804576e 100644
+index 61c0b8382c78f63ad9113af55a6236c4a29bc45b..0ab463c768d4fb3f45d22e753f408c46b61c0480 100644
 --- a/browser/themes/shared/tabbrowser/tabs.css
 +++ b/browser/themes/shared/tabbrowser/tabs.css
-@@ -45,7 +45,7 @@
+@@ -46,7 +46,7 @@
    --tab-group-line-thickness: 2px;
    --tab-group-line-toolbar-border-distance: 1px;
    /* Collapsed tabs should be square, so set width to match the min height */
 -  --tab-collapsed-background-width: var(--tab-min-height);
 +  --tab-collapsed-background-width: 48px;
    --tab-collapsed-width: calc(var(--tab-collapsed-background-width) + 2 * var(--tab-inner-inline-margin));
+   --tab-collapsed-split-pill-offset: 0px;
    --tab-pinned-min-width-expanded: calc(var(--tab-pinned-expanded-background-width) + 2 * var(--tab-pinned-margin-inline-expanded));
-   --tab-note-icon-end-margin: var(--dimension-4);
+@@ -308,7 +308,6 @@ tab-split-view-wrapper[dragtarget] {
-@@ -295,7 +295,6 @@ tab-split-view-wrapper[dragtarget] {
    }
  
    :root:not([uidensity="compact"], [sidebar-expand-on-hover]) &[pinned] {
@@ -19,7 +19,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    }
  
    &:is([selected], [multiselected]) {
-@@ -309,6 +308,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -322,6 +321,7 @@ tab-split-view-wrapper[dragtarget] {
      border-radius: inherit;
      position: relative;
      overflow: hidden;
@@ -27,7 +27,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
  
      &::before {
        position: absolute;
-@@ -506,10 +506,6 @@ tab-split-view-wrapper[dragtarget] {
+@@ -519,10 +519,6 @@ tab-split-view-wrapper[dragtarget] {
  
    @media -moz-pref("browser.tabs.fadeOutUnloadedTabs") {
      &[pending] {
@@ -38,7 +38,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
        opacity: 0.5;
        /* Fade the favicon out */
        transition-property: filter, opacity;
-@@ -525,10 +521,6 @@ tab-split-view-wrapper[dragtarget] {
+@@ -538,10 +534,6 @@ tab-split-view-wrapper[dragtarget] {
  
    @media -moz-pref("browser.tabs.fadeOutExplicitlyUnloadedTabs") {
      &[pending][discarded] {
@@ -49,7 +49,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
        opacity: 0.5;
        /* Fade the favicon out */
        transition-property: filter, opacity;
-@@ -602,7 +594,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -615,7 +607,7 @@ tab-split-view-wrapper[dragtarget] {
    }
  
    #tabbrowser-tabs[orient="vertical"] & {
@@ -58,7 +58,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    }
  
    &[crashed] {
-@@ -610,7 +602,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -623,7 +615,7 @@ tab-split-view-wrapper[dragtarget] {
    }
  
    #tabbrowser-tabs[orient="vertical"]:not([expanded]) &:not([crashed]),
@@ -67,7 +67,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
      &[soundplaying] {
        list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-playing-small.svg");
      }
-@@ -664,7 +656,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -677,7 +669,7 @@ tab-split-view-wrapper[dragtarget] {
      }
    }
  
@@ -76,7 +76,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    &[crashed] {
      display: revert;
    }
-@@ -824,7 +816,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -837,7 +829,7 @@ tab-split-view-wrapper[dragtarget] {
        has not been added to root. There are certain scenarios when that attribute is temporarily
        removed from root such as when toggling the sidebar to expand with the toolbar button. */
      #tabbrowser-tabs[orient="horizontal"] &:not([pinned]):not([crashed]),
@@ -85,7 +85,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
        &:is([soundplaying], [muted], [activemedia-blocked]) {
          display: flex;
        }
-@@ -1044,7 +1036,6 @@ tab-split-view-wrapper[dragtarget] {
+@@ -1151,7 +1143,6 @@ tab-split-view-wrapper[dragtarget] {
  .tabbrowser-tab:is([image], [pinned]) > .tab-stack > .tab-content[attention]:not([selected]),
  .tabbrowser-tab > .tab-stack > .tab-content[pinned][titlechanged]:not([selected]),
  #tabbrowser-tabs[orient="vertical"] .tabbrowser-tab > .tab-stack > .tab-content[titlechanged]:not([selected]) {
@@ -93,7 +93,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    background-position: center bottom 6.5px;
    background-size: 4px 4px;
    background-repeat: no-repeat;
-@@ -1797,7 +1788,7 @@ tab-group {
+@@ -1904,7 +1895,7 @@ tab-group {
  }
  
  #tabbrowser-tabs[orient="vertical"][expanded] {
@@ -102,7 +102,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    &[movingtab][movingtab-addToGroup]:not([movingtab-group], [movingtab-ungroup]) .tabbrowser-tab:is(:active, [multiselected]) {
      margin-inline-start: var(--space-medium);
    }
-@@ -2351,7 +2342,7 @@ tab-group {
+@@ -2504,7 +2495,7 @@ tab-group {
    }
  }
  
@@ -111,8 +111,8 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
  #vertical-tabs-newtab-button {
    appearance: none;
    min-height: var(--tab-min-height);
-@@ -2362,7 +2353,7 @@ tab-group {
+@@ -2524,7 +2515,7 @@ tab-group {
-   margin-inline: var(--tab-inner-inline-margin);
+   }
  
    #tabbrowser-tabs[orient="vertical"]:not([expanded]) & > .toolbarbutton-text {
 -    display: none;
@@ -120,7 +120,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    }
  
    &:hover {
-@@ -2386,7 +2377,7 @@ tab-group {
+@@ -2548,7 +2539,7 @@ tab-group {
   * flex container. #tabs-newtab-button is a child of the arrowscrollbox where
   * we don't want a gap (between tabs), so we have to add some margin.
   */
@@ -129,7 +129,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    margin-block: var(--tab-margin-block);
  }
  
-@@ -2576,7 +2567,6 @@ tab-group {
+@@ -2740,7 +2731,6 @@ tab-group {
  
    &:not([expanded]) {
      .tabbrowser-tab[pinned] {
@@ -137,7 +137,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
      }
  
      .tab-background {
-@@ -2615,8 +2605,8 @@ tab-group {
+@@ -2779,8 +2769,8 @@ tab-group {
        display: block;
        position: absolute;
        inset: auto;
@@ -148,7 +148,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
  
        &:-moz-window-inactive {
          background-image:
-@@ -2714,9 +2704,6 @@ tab-group {
+@@ -2878,9 +2868,6 @@ tab-group {
    ~ #tabbrowser-tabs[orient="horizontal"]::before {
      display: flex;
      content: "";
@@ -158,7 +158,7 @@ index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f25
    }
  }
  
-@@ -2749,7 +2736,6 @@ toolbar:not(#TabsToolbar) #firefox-view-button {
+@@ -2913,7 +2900,6 @@ toolbar:not(#TabsToolbar) #firefox-view-button {
    list-style-image: url(chrome://global/skin/icons/plus.svg);
  }
  

src/browser/themes/shared/urlbar-searchbar-css.patch

@@ -1,19 +1,19 @@
 diff --git a/browser/themes/shared/urlbar-searchbar.css b/browser/themes/shared/urlbar-searchbar.css
-index 22d624d718a289dd7b84ffc2f04dd35893dfbe95..4f57f7853f3043e3ad01d893aa928b9d2e6f3c16 100644
+index 149f123e26cd79e89432dfeb504ca7218ee04810..7e0e6d981d6c2aa53bc2a76d82d2078419659065 100644
 --- a/browser/themes/shared/urlbar-searchbar.css
 +++ b/browser/themes/shared/urlbar-searchbar.css
 @@ -19,8 +19,8 @@
  
    @media not -moz-pref("browser.nova.enabled") {
-     --urlbar-basic-component-size: calc(var(--urlbar-min-height) - 2 * (var(--urlbar-input-container-border-width) + var(--urlbar-input-container-padding)));
+     --urlbar-basic-component-size: calc(var(--urlbar-height) - 2 * (var(--urlbar-input-container-border-width) + var(--urlbar-input-container-padding)));
--    --urlbar-icon-padding: calc((var(--urlbar-min-height) - 2px /* border */ - 2px /* padding */ - 16px /* icon */) / 2);
+-    --urlbar-icon-padding: calc((var(--urlbar-height) - 2px /* border */ - 2px /* padding */ - 16px /* icon */) / 2);
 -    --urlbar-input-container-padding: round(up, 1px, env(hairline));
-+    --urlbar-icon-padding: calc((var(--urlbar-min-height) - 2px /* border */ - 14px /* icon */) / 2);
++    --urlbar-icon-padding: calc((var(--urlbar-height) - 2px /* border */ - 14px /* icon */) / 2);
 +    --urlbar-input-container-padding: 2px;
    }
    @media (max-width: 770px) {
      --urlbar-container-min-width: 240px;
-@@ -126,7 +126,7 @@ toolbar[inactive="true"] .urlbar,
+@@ -127,7 +127,7 @@ toolbar[inactive="true"] .urlbar,
  .urlbar:not([usertyping]) > .urlbar-input-container > .urlbar-go-button,
  .urlbar:not(#searchbar-new, [focused]) > .urlbar-input-container > .urlbar-go-button,
  #urlbar-revert-button-container {
@@ -22,7 +22,7 @@ index 22d624d718a289dd7b84ffc2f04dd35893dfbe95..4f57f7853f3043e3ad01d893aa928b9d
  }
  
  /* Document Picture-in-Picture API window */
-@@ -403,6 +403,10 @@ toolbar[inactive="true"] .urlbar,
+@@ -405,6 +405,10 @@ toolbar[inactive="true"] .urlbar,
    .urlbar:not([focused])[textoverflow="left"][domaindir="rtl"] > .urlbar-input-container > .urlbar-input-box > & {
      mask-image: linear-gradient(to right, transparent var(--urlbar-scheme-size), black calc(var(--urlbar-scheme-size) + 3ch));
    }
@@ -33,16 +33,18 @@ index 22d624d718a289dd7b84ffc2f04dd35893dfbe95..4f57f7853f3043e3ad01d893aa928b9d
  }
  
  #urlbar-scheme {
-@@ -492,10 +496,14 @@ toolbar[inactive="true"] .urlbar,
+@@ -476,10 +480,15 @@ toolbar[inactive="true"] .urlbar,
+   }
  
    .urlbar[breakout][breakout-extend] {
-     height: auto;
+-    margin-left: calc(-1 * var(--urlbar-margin-inline));
 +    align-items: center;
-+    :root:not([zen-single-toolbar='true']) & {
-     margin-left: calc(-1 * var(--urlbar-margin-inline));
-+    }
      width: calc(var(--urlbar-width) + 2 * var(--urlbar-margin-inline));
  
++    :root:not([zen-single-toolbar="true"]) & {
++      margin-left: calc(-1 * var(--urlbar-margin-inline));
++    }
++
      > .urlbar-input-container {
 +      align-items: center;
        height: var(--urlbar-container-height);

src/browser/themes/shared/zen-icons/icons.css

@@ -812,7 +812,8 @@
 
 #toolbar-context-toggle-vertical-tabs,
 #toolbar-context-customize-sidebar,
-#sidebarRevampSeparator {
+#sidebarRevampSeparator,
+.fxa-menu-sign-in-promo-image {
   display: none !important;
 }
 
@@ -879,7 +880,7 @@
   border-radius: var(--tab-border-radius);
 
   &:hover {
-    background: var(--toolbarbutton-hover-background);
+    background: var(--toolbarbutton-background-color-hover);
   }
 
   & image {

src/external-patches/firefox/add_urlbar_closeonwindowblur_preference.patch

@@ -1,76 +0,0 @@
-diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
---- a/browser/app/profile/firefox.js
-+++ b/browser/app/profile/firefox.js
-@@ -411,10 +411,13 @@
- pref("browser.urlbar.maxRichResults", 10);
- 
- // The maximum number of historical search results to show.
- pref("browser.urlbar.maxHistoricalSearchSuggestions", 2);
- 
-+// Whether to close the urlbar when blurring the window while the urlbar is focused.
-+pref("browser.urlbar.closeOnWindowBlur", true);
-+
- // The default behavior for the urlbar can be configured to use any combination
- // of the match filters with each additional filter adding more results (union).
- pref("browser.urlbar.suggest.bookmark",             true);
- pref("browser.urlbar.suggest.clipboard",            true);
- pref("browser.urlbar.suggest.history",              true);
-diff --git a/browser/components/urlbar/UrlbarPrefs.sys.mjs b/browser/components/urlbar/UrlbarPrefs.sys.mjs
---- a/browser/components/urlbar/UrlbarPrefs.sys.mjs
-+++ b/browser/components/urlbar/UrlbarPrefs.sys.mjs
-@@ -152,10 +152,13 @@
-   ["filter.javascript", true],
- 
-   // Feature gate pref for flight status suggestions in the urlbar.
-   ["flightStatus.featureGate", false],
- 
-+  // Whether to close the urlbar when blurring the window while the urlbar is focused.
-+  ["closeOnWindowBlur", true],
-+
-   // The minimum prefix length of a flight status keyword the user must type to
-   // trigger the suggestion. 0 means the min length should be taken from Nimbus
-   // or remote settings.
-   ["flightStatus.minKeywordLength", 0],
- 
-diff --git a/browser/components/urlbar/content/UrlbarView.mjs b/browser/components/urlbar/content/UrlbarView.mjs
---- a/browser/components/urlbar/content/UrlbarView.mjs
-+++ b/browser/components/urlbar/content/UrlbarView.mjs
-@@ -3909,10 +3909,16 @@
-       }
-     }
-   }
- 
-   on_blur() {
-+    if (
-+      this.document.commandDispatcher.focusedElement == this.input.inputField &&
-+      !lazy.UrlbarPrefs.get("closeOnWindowBlur")
-+    ) {
-+      return;
-+    }
-     // If the view is open without the input being focused, it will not close
-     // automatically when the window loses focus. We might be in this state
-     // after a Search Tip is shown on an engine homepage.
-     if (!lazy.UrlbarPrefs.get("ui.popup.disable_autohide")) {
-       this.close();
-diff --git a/browser/components/urlbar/content/UrlbarInput.mjs b/browser/components/urlbar/content/UrlbarInput.mjs
---- a/browser/components/urlbar/content/UrlbarInput.mjs
-+++ b/browser/components/urlbar/content/UrlbarInput.mjs
-@@ -5460,11 +5460,17 @@
-   _on_blur(event) {
-     if (this.view.resultMenu.hasAttribute("open")) {
-       return;
-     }
- 
-     lazy.logger.debug("Blur Event");
-+    if (
-+      this.document.commandDispatcher.focusedElement == this.inputField &&
-+      !lazy.UrlbarPrefs.get("closeOnWindowBlur")
-+    ) {
-+      return;
-+    }
-     // We cannot count every blur events after a missed engagement as abandoment
-     // because the user may have clicked on some view element that executes
-     // a command causing a focus change. For example opening preferences from
-     // the oneoff settings button.
-     // For now we detect that case by discarding the event on command, but we
-     // may want to figure out a more robust way to detect abandonment.

src/external-patches/firefox/allow_backdrop_to_work_on_transparency.patch

@@ -31,12 +31,13 @@ diff --git a/gfx/webrender_bindings/src/bindings.rs b/gfx/webrender_bindings/src
  
      // Ensure the WR profiler callbacks are hooked up to the Gecko profiler.
      set_profiler_hooks(Some(&PROFILER_HOOKS));
-@@ -2164,10 +2165,11 @@
+@@ -2164,11 +2165,12 @@
          texture_cache_config,
          reject_software_rasterizer,
          low_quality_pinch_zoom,
          max_shared_surface_size,
          enable_dithering,
+         enable_shared_instance_buffer,
 +        opaque_backdrop_fallback,
          ..Default::default()
      };
@@ -73,8 +74,9 @@ diff --git a/gfx/wr/webrender/src/renderer/init.rs b/gfx/wr/webrender/src/render
 +    /// See explanation of `gfx.webrender.opaque-backdrop-fallback`.
 +    pub opaque_backdrop_fallback: bool,
  }
-@@ -277,9 +279,10 @@
+@@ -277,10 +279,11 @@
              enable_instancing: true,
+             enable_shared_instance_buffer: false,
              reject_software_rasterizer: false,
              low_quality_pinch_zoom: false,
              max_shared_surface_size: 2048,
@@ -84,12 +86,13 @@ diff --git a/gfx/wr/webrender/src/renderer/init.rs b/gfx/wr/webrender/src/render
      }
  }
  
-@@ -802,10 +805,11 @@
+@@ -802,11 +805,12 @@
          allocated_native_surfaces: FastHashSet::default(),
          debug_overlay_state: DebugOverlayState::new(),
          buffer_damage_tracker: BufferDamageTracker::default(),
          max_primitive_instance_count,
          enable_instancing: options.enable_instancing,
+         use_shared_instance_buffer,
 +        opaque_backdrop_fallback: options.opaque_backdrop_fallback,
          consecutive_oom_frames: 0,
          target_frame_publish_id: None,
@@ -99,11 +102,14 @@ diff --git a/gfx/wr/webrender/src/renderer/init.rs b/gfx/wr/webrender/src/render
 diff --git a/gfx/wr/webrender/src/renderer/mod.rs b/gfx/wr/webrender/src/renderer/mod.rs
 --- a/gfx/wr/webrender/src/renderer/mod.rs
 +++ b/gfx/wr/webrender/src/renderer/mod.rs
-@@ -867,10 +867,12 @@
+@@ -867,13 +867,15 @@
      buffer_damage_tracker: BufferDamageTracker,
  
      max_primitive_instance_count: usize,
      enable_instancing: bool,
+     /// If true, stream instance data into large buffers shared by multiple
+     /// draws, rather than allocating a new instance buffer for each draw.
+     use_shared_instance_buffer: bool,
  
 +    opaque_backdrop_fallback: bool,
 +

src/external-patches/firefox/bug_2011236.patch

@@ -0,0 +1,168 @@
+diff --git a/browser/components/sessionstore/test/browser.toml b/browser/components/sessionstore/test/browser.toml
+--- a/browser/components/sessionstore/test/browser.toml
++++ b/browser/components/sessionstore/test/browser.toml
+@@ -14,10 +14,12 @@
+   "browser_frame_history_c.html",
+   "browser_frame_history_c1.html",
+   "browser_frame_history_c2.html",
+   "browser_formdata_format_sample.html",
+   "browser_sessionHistory_slow.sjs",
++  "browser_policy_container_sample.html",
++  "browser_policy_container_sample_frame.html",
+   "browser_scrollPositions_sample.html",
+   "browser_scrollPositions_sample2.html",
+   "browser_scrollPositions_sample_frameset.html",
+   "browser_scrollPositions_readerModeArticle.html",
+   "browser_sessionStorage.html",
+@@ -226,10 +228,12 @@
+ ["browser_pinned_tabs.js"]
+ skip-if = [
+   "ccov", # Bug 1625525
+ ]
+ 
++["browser_policy_container_not_stored.js"]
++
+ ["browser_privatetabs.js"]
+ 
+ ["browser_purge_domaindata.js"]
+ 
+ ["browser_purge_shistory.js"]
+diff --git a/browser/components/sessionstore/test/browser_policy_container_not_stored.js b/browser/components/sessionstore/test/browser_policy_container_not_stored.js
+new file mode 100644
+--- /dev/null
++++ b/browser/components/sessionstore/test/browser_policy_container_not_stored.js
+@@ -0,0 +1,51 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++"use strict";
++
++/**
++ * A session history entry only needs to retain the policy container for loads
++ * that inherit their policies (about:blank, about:srcdoc, blob:, data:, ...).
++ * Anything fetched over the network gets its policies from the response again,
++ * so storing them would only bloat the session store (bug 2011236).
++ */
++
++const TEST_ROOT = getRootDirectory(gTestPath).replace(
++  "chrome://mochitests/content",
++  "https://example.com"
++);
++const PARENT_URL = TEST_ROOT + "browser_policy_container_sample.html";
++const FRAME_URL = TEST_ROOT + "browser_policy_container_sample_frame.html";
++
++add_task(async function test_policy_container_only_for_inheriting_loads() {
++  const tab = BrowserTestUtils.addTab(gBrowser, PARENT_URL);
++  gBrowser.selectedTab = tab;
++  await promiseBrowserLoaded(tab.linkedBrowser, true, PARENT_URL);
++  await TabStateFlusher.flush(tab.linkedBrowser);
++
++  const state = JSON.parse(ss.getTabState(tab));
++  const topEntry = state.entries.at(-1);
++  is(topEntry.url, PARENT_URL, "collected the parent entry");
++
++  const children = topEntry.children ?? [];
++  const networkFrame = children.find(child => child.url === FRAME_URL);
++  const blankFrame = children.find(child => child.url === "about:blank");
++
++  ok(networkFrame, "collected the network-scheme subframe entry");
++  ok(blankFrame, "collected the about:blank subframe entry");
++
++  // The parent has a CSP, so both subframes inherit a policy container onto
++  // their load state. Only the one that cannot recover it from a response
++  // should keep it in session history.
++  ok(
++    !("policyContainer" in networkFrame),
++    "https subframe entry does not store a policyContainer"
++  );
++  ok(
++    "policyContainer" in blankFrame,
++    "about:blank subframe entry still stores its inherited policyContainer"
++  );
++
++  await BrowserTestUtils.removeTab(tab);
++});
+diff --git a/browser/components/sessionstore/test/browser_policy_container_sample.html b/browser/components/sessionstore/test/browser_policy_container_sample.html
+new file mode 100644
+--- /dev/null
++++ b/browser/components/sessionstore/test/browser_policy_container_sample.html
+@@ -0,0 +1,12 @@
++<!DOCTYPE html>
++<html>
++<head>
++  <meta charset="utf-8">
++  <meta http-equiv="Content-Security-Policy" content="default-src * data: blob: 'unsafe-inline'">
++  <title>policyContainer session store sample</title>
++</head>
++<body>
++  <iframe id="network" src="browser_policy_container_sample_frame.html"></iframe>
++  <iframe id="blank" src="about:blank"></iframe>
++</body>
++</html>
+diff --git a/browser/components/sessionstore/test/browser_policy_container_sample_frame.html b/browser/components/sessionstore/test/browser_policy_container_sample_frame.html
+new file mode 100644
+--- /dev/null
++++ b/browser/components/sessionstore/test/browser_policy_container_sample_frame.html
+@@ -0,0 +1,10 @@
++<!DOCTYPE html>
++<html>
++<head>
++  <meta charset="utf-8">
++  <title>policyContainer session store sample frame</title>
++</head>
++<body>
++  frame
++</body>
++</html>
+diff --git a/docshell/shistory/SessionHistoryEntry.cpp b/docshell/shistory/SessionHistoryEntry.cpp
+--- a/docshell/shistory/SessionHistoryEntry.cpp
++++ b/docshell/shistory/SessionHistoryEntry.cpp
+@@ -41,10 +41,18 @@
+ extern mozilla::LazyLogModule gSHLog;
+ 
+ namespace mozilla {
+ namespace dom {
+ 
++// Only store policy container for loads that can't carry it themselves
++// (about:blank, about:srcdoc, blob:, data:, ...)
++// bug 1867137, bug 2011236
++static nsIPolicyContainer* PolicyContainerToStore(
++    nsIURI* aURI, nsIPolicyContainer* aPolicyContainer) {
++  return CSP_ShouldURIInheritCSP(aURI) ? aPolicyContainer : nullptr;
++}
++
+ SessionHistoryInfo::SessionHistoryInfo(nsDocShellLoadState* aLoadState,
+                                        nsIChannel* aChannel)
+     : mURI(aLoadState->URI()),
+       mOriginalURI(aLoadState->OriginalURI()),
+       mResultPrincipalURI(aLoadState->ResultPrincipalURI()),
+@@ -59,11 +67,12 @@
+       mLoadReplace(aLoadState->LoadReplace()),
+       mHasUserActivation(aLoadState->HasValidUserGestureActivation()),
+       mSharedState(SharedState::Create(
+           aLoadState->TriggeringPrincipal(), aLoadState->PrincipalToInherit(),
+           aLoadState->PartitionedPrincipalToInherit(),
+-          aLoadState->PolicyContainer(),
++          PolicyContainerToStore(aLoadState->URI(),
++                                 aLoadState->PolicyContainer()),
+           /* FIXME Is this correct? */
+           aLoadState->TypeHint())) {
+   MOZ_DIAGNOSTIC_ASSERT(!mURI->SchemeIs("javascript"));
+ 
+   // Pull the upload stream off of the channel instead of the load state, as
+@@ -124,11 +133,12 @@
+   loadInfo->GetPrincipalToInherit(
+       getter_AddRefs(mSharedState.Get()->mPrincipalToInherit));
+ 
+   mSharedState.Get()->mPartitionedPrincipalToInherit =
+       aPartitionedPrincipalToInherit;
+-  mSharedState.Get()->mPolicyContainer = aPolicyContainer;
++  mSharedState.Get()->mPolicyContainer =
++      PolicyContainerToStore(mURI, aPolicyContainer);
+   aChannel->GetContentType(mSharedState.Get()->mContentType);
+   aChannel->GetOriginalURI(getter_AddRefs(mOriginalURI));
+ 
+   uint32_t loadFlags;
+   aChannel->GetLoadFlags(&loadFlags);
+

src/external-patches/firefox/issue_14710.patch

@@ -0,0 +1,55 @@
+diff --git a/toolkit/components/pictureinpicture/PictureInPicture.sys.mjs b/toolkit/components/pictureinpicture/PictureInPicture.sys.mjs
+--- a/toolkit/components/pictureinpicture/PictureInPicture.sys.mjs
++++ b/toolkit/components/pictureinpicture/PictureInPicture.sys.mjs
+@@ -119,10 +119,19 @@
+       }
+       case "PictureInPicture:VideoTabHidden": {
+         if (!lazy.PIP_ENABLED || !lazy.PIP_WHEN_SWITCHING_TABS) {
+           break;
+         }
++
++        // Suppress auto-toggle if the user deliberately closed this PiP window
++        if (
++          PictureInPicture.weakAutoPipBrowserClosedDeliberately.has(browser)
++        ) {
++          PictureInPicture.weakAutoPipBrowserClosedDeliberately.delete(browser);
++          break;
++        }
++
+         // If the tab is still selected, then we can ignore this event
+         if (browser.documentGlobal.gBrowser.selectedBrowser == browser) {
+           break;
+         }
+         let actor = browsingContext.currentWindowGlobal.getActor(
+@@ -261,10 +270,12 @@
+   maxConcurrentPlayerCount: 0,
+ 
+   // Maps auto pip browser to PictureInPictureParent actor
+   weakAutoPipBrowserToParent: new WeakMap(),
+ 
++  weakAutoPipBrowserClosedDeliberately: new WeakSet(),
++
+   /**
+    * Returns the player window if one exists and if it hasn't yet been closed.
+    *
+    * @param {PictureInPictureParent} pipActorRef
+    *   Reference to the calling PictureInPictureParent actor
+@@ -899,10 +910,17 @@
+     const { reason, actorRef } = closeData;
+     const win = this.getWeakPipPlayer(actorRef);
+     if (!win) {
+       return;
+     }
++
++    const browser = this.weakWinToBrowser.get(win);
++
++    if (reason === "CloseButton") {
++      PictureInPicture.weakAutoPipBrowserClosedDeliberately.add(browser);
++    }
++
+     this.removePiPBrowserFromWeakMap(this.weakWinToBrowser.get(win));
+     this.weakAutoPipBrowserToParent.delete(this.weakWinToBrowser.get(win));
+ 
+     Glean.pictureinpicture["closedMethod" + reason].record();
+     await this.closePipWindow(win);
+

src/external-patches/manifest.json

@@ -7,14 +7,6 @@
     "id": "D299584",
     "name": "Native MacOS popovers fix"
   },
-  {
-    "type": "phabricator",
-    "id": "D284404",
-    "name": "Add urlbar closeOnWindowBlur preference",
-    "replaces": {
-      "\n\n": "\n     // may want to figure out a more robust way to detect abandonment."
-    }
-  },
   {
     "type": "local",
     // TODO: Convert into https://phabricator.services.mozilla.com/D298079
@@ -48,5 +40,19 @@
       "this._lastJsonLength = uncompressedBytes;": "this._lastJsonLength = uncompressedBytes.jsonLength;",
       "          jsonLengthHint,": "          lengthHint: jsonLengthHint,"
     }
+  },
+  {
+    "type": "phabricator",
+    "id": "D320897",
+    "name": "Bug 2011236"
+  },
+  {
+    "type": "phabricator",
+    "id": "D321446",
+    "name": "Issue 14710"
+  },
+  {
+    "type": "local",
+    "path": "firefox/css_corner_shape_rendering.patch"
   }
 ]

src/layout/style/StyleColor-cpp.patch

@@ -1,16 +1,16 @@
 diff --git a/layout/style/StyleColor.cpp b/layout/style/StyleColor.cpp
-index bbee32af30f35525730a10d0b242c0e8a8fe4695..a590fff105b30bc96fa7a0d8a8d3b1d5aa997e08 100644
+index f922f7fdacc7e1a14beb8da77b48aef3f6ae0b2b..47d19242baaf2a1f25ee07c6e210c839cc7b5089 100644
 --- a/layout/style/StyleColor.cpp
 +++ b/layout/style/StyleColor.cpp
-@@ -9,6 +9,7 @@
+@@ -8,6 +8,7 @@
- #include "mozilla/dom/BindingDeclarations.h"
+ #include "mozilla/StyleColorInlines.h"
  #include "nsIFrame.h"
  #include "nsStyleStruct.h"
 +#include "mozilla/nsZenBoostsBackend.h"
+ #include "nsStyleUtil.h"
  
  namespace mozilla {
- 
+@@ -98,23 +99,24 @@ StyleAbsoluteColor StyleColor::ResolveColor(
-@@ -96,23 +97,24 @@ StyleAbsoluteColor StyleColor::ResolveColor(
  
  template <>
  nscolor StyleColor::CalcColor(nscolor aColor) const {
@@ -40,7 +40,7 @@ index bbee32af30f35525730a10d0b242c0e8a8fe4695..a590fff105b30bc96fa7a0d8a8d3b1d5
  }
  
  StyleAbsoluteColor StyleAbsoluteColor::ToColorSpace(
-@@ -120,7 +122,7 @@ StyleAbsoluteColor StyleAbsoluteColor::ToColorSpace(
+@@ -122,7 +124,7 @@ StyleAbsoluteColor StyleAbsoluteColor::ToColorSpace(
    return Servo_ConvertColorSpace(this, aColorSpace);
  }
  
@@ -49,7 +49,7 @@ index bbee32af30f35525730a10d0b242c0e8a8fe4695..a590fff105b30bc96fa7a0d8a8d3b1d5
    constexpr StyleColorSpace DEST_COLOR_SPACE = StyleColorSpace::Srgb;
  
    constexpr float MIN = 0.0f;
-@@ -162,11 +164,13 @@ nscolor StyleAbsoluteColor::ToColor() const {
+@@ -164,11 +166,13 @@ nscolor StyleAbsoluteColor::ToColor() const {
      }
    }
  

src/layout/svg/SVGImageContext-h.patch

@@ -1,5 +1,5 @@
 diff --git a/layout/svg/SVGImageContext.h b/layout/svg/SVGImageContext.h
-index b1f811989697966e30859610f4fc07579d0385ab..f6f4cd5a45fc49b416111d980fab4e612788903e 100644
+index ad833c7c2ee6a4c4984efdb0d59e3576c2d1bc19..36864a34badc0cbfe44d6295798622fd6178f9e3 100644
 --- a/layout/svg/SVGImageContext.h
 +++ b/layout/svg/SVGImageContext.h
 @@ -6,6 +6,7 @@
@@ -44,7 +44,7 @@ index b1f811989697966e30859610f4fc07579d0385ab..f6f4cd5a45fc49b416111d980fab4e61
    const Maybe<SVGPreserveAspectRatio>& GetPreserveAspectRatio() const {
      return mPreserveAspectRatio;
    }
-@@ -116,7 +137,11 @@ class SVGImageContext {
+@@ -110,7 +131,11 @@ class SVGImageContext {
      return contextPaintIsEqual && mViewportSize == aOther.mViewportSize &&
             mPreserveAspectRatio == aOther.mPreserveAspectRatio &&
             mColorScheme == aOther.mColorScheme &&
@@ -57,8 +57,8 @@ index b1f811989697966e30859610f4fc07579d0385ab..f6f4cd5a45fc49b416111d980fab4e61
    }
  
    bool operator!=(const SVGImageContext&) const = default;
-@@ -129,7 +154,8 @@ class SVGImageContext {
+@@ -123,7 +148,8 @@ class SVGImageContext {
-     return HashGeneric(hash, mViewportSize.map(HashSize).valueOr(0),
+     return AddToHash(hash, mViewportSize.map(HashSize).valueOr(0),
                       mPreserveAspectRatio.map(HashPAR).valueOr(0),
                       mColorScheme.map(HashColorScheme).valueOr(0),
 -                     HashLinkParameters(mLinkParameters));
@@ -67,7 +67,7 @@ index b1f811989697966e30859610f4fc07579d0385ab..f6f4cd5a45fc49b416111d980fab4e61
    }
  
   private:
-@@ -167,6 +193,9 @@ class SVGImageContext {
+@@ -156,6 +182,9 @@ class SVGImageContext {
    Maybe<SVGPreserveAspectRatio> mPreserveAspectRatio;
    Maybe<ColorScheme> mColorScheme;
    StyleLinkParameters mLinkParameters;

src/services/sync/modules/service-sys-mjs.patch

@@ -1,5 +1,5 @@
 diff --git a/services/sync/modules/service.sys.mjs b/services/sync/modules/service.sys.mjs
-index 4f4efe572909441abdd81909282936702c225621..81ab06a9414ed656b644a21b40b683f06a4f8dbf 100644
+index 4f4efe572909441abdd81909282936702c225621..2b47a2c9e97cf87641a0be9814f9a6be4d43f6ea 100644
 --- a/services/sync/modules/service.sys.mjs
 +++ b/services/sync/modules/service.sys.mjs
 @@ -99,6 +99,10 @@ function getEngineModules() {
@@ -7,8 +7,8 @@ index 4f4efe572909441abdd81909282936702c225621..81ab06a9414ed656b644a21b40b683f0
      whenFalse: "ExtensionStorageEngineBridge",
    };
 +  result.Spaces = {
-+    module: "resource:///modules/zen/ZenWorkspacesSync.sys.mjs",
++    module: "resource:///modules/zen/ZenSpacesSync.sys.mjs",
-+    symbol: "ZenWorkspacesEngine",
++    symbol: "ZenSpacesSyncEngine",
 +  };
    return result;
  }

src/testing/xpcshell/runxpcshelltests-py.patch

@@ -0,0 +1,14 @@
+diff --git a/testing/xpcshell/runxpcshelltests.py b/testing/xpcshell/runxpcshelltests.py
+index 403401613189ffb758037850dc6bbb1d55f194ab..cad28e245155eb54775e551885532026e56c5fa9 100755
+--- a/testing/xpcshell/runxpcshelltests.py
++++ b/testing/xpcshell/runxpcshelltests.py
+@@ -2275,6 +2275,9 @@ class XPCShellTests:
+         appDirKey = None
+         if "appname" in self.mozInfo:
+             appDirKey = self.mozInfo["appname"] + "-appdir"
++            if appDirKey == "zen-appdir":
++                # Inherited manifests use firefox-appdir.
++                appDirKey = "firefox-appdir"
+ 
+         # We have to do this before we run tests that depend on having the node
+         # http/2 server.

src/toolkit/components/contextualidentity/ContextualIdentityService-sys-mjs.patch

@@ -1,37 +0,0 @@
-diff --git a/toolkit/components/contextualidentity/ContextualIdentityService.sys.mjs b/toolkit/components/contextualidentity/ContextualIdentityService.sys.mjs
-index 5702ff28cc22206f5ce16584dac8a78d816562ce..3d08ecc97ce5995b30d8a4af0c33df329b428008 100644
---- a/toolkit/components/contextualidentity/ContextualIdentityService.sys.mjs
-+++ b/toolkit/components/contextualidentity/ContextualIdentityService.sys.mjs
-@@ -270,11 +270,29 @@ _ContextualIdentityService.prototype = {
-     });
-   },
- 
--  create(name, icon, color) {
-+  create(name, icon, color, id = null) {
-     this.ensureDataReady();
- 
--    // Retrieve the next userContextId available.
--    let userContextId = ++this._lastUserContextId;
-+    if (id !== null) {
-+      id = typeof id == "string" ? Number(id) : id;
-+      if (!Number.isSafeInteger(id) || id <= 0) {
-+        throw new Error(`Invalid userContextId '${id}'`);
-+      }
-+    }
-+
-+    let userContextId;
-+    if (
-+      id !== null &&
-+      !this._identities.some(identity => identity.userContextId === id)
-+    ) {
-+      userContextId = id;
-+      this._lastUserContextId = Math.max(
-+        this._lastUserContextId,
-+        userContextId
-+      );
-+    } else {
-+      userContextId = ++this._lastUserContextId;
-+    }
- 
-     // Throw an error if the next userContextId available is invalid (the one associated to
-     // MAX_USER_CONTEXT_ID is already reserved to "userContextIdInternal.webextStorageLocal", which

src/toolkit/content/widgets/moz-toggle/moz-toggle-tokens-css.patch

@@ -1,5 +1,5 @@
 diff --git a/toolkit/content/widgets/moz-toggle/moz-toggle.tokens.css b/toolkit/content/widgets/moz-toggle/moz-toggle.tokens.css
-index 6247d7a3923a6fedd4ec9911aba309ce565cd498..744e670eccc936dde664aa07df3e87bdcafd5e48 100644
+index c0976c54418a28046802443931042bd285aefbde..2adb18d25edbb8aac4e396fcfc64a4a664607836 100644
 --- a/toolkit/content/widgets/moz-toggle/moz-toggle.tokens.css
 +++ b/toolkit/content/widgets/moz-toggle/moz-toggle.tokens.css
 @@ -13,8 +13,8 @@
@@ -11,5 +11,5 @@ index 6247d7a3923a6fedd4ec9911aba309ce565cd498..744e670eccc936dde664aa07df3e87bd
 +    --toggle-background-color-pressed: var(--zen-primary-color);
 +    --toggle-background-color-pressed-hover: var(--zen-colors-hover-bg);
      --toggle-background-color-pressed-active: var(--color-accent-primary-active);
-     --toggle-border-color: var(--border-color-interactive);
+     --toggle-border-color: light-dark(var(--color-gray-70), var(--border-color-interactive));
      --toggle-border-color-hover: var(--toggle-border-color);

src/toolkit/content/widgets/panel-list/panel-list-mjs.patch

@@ -0,0 +1,29 @@
+diff --git a/toolkit/content/widgets/panel-list/panel-list.mjs b/toolkit/content/widgets/panel-list/panel-list.mjs
+index 68ad2fafc8b31dfff541cf8381d9b9533e376d1c..fa62fec6bfb33338091fc06d3736fb76fd5c47c4 100644
+--- a/toolkit/content/widgets/panel-list/panel-list.mjs
++++ b/toolkit/content/widgets/panel-list/panel-list.mjs
+@@ -223,7 +223,12 @@ export class PanelList extends HTMLElement {
+     this.setAttribute("showing", "true");
+     // Tell the host element to hide any overflow in case the panel extends off
+     // the page before the alignment is set.
+-    hostElement.style.overflow = "hidden";
++    const hostHidesOverflow = !getComputedStyle(hostElement)
++      .overflow.split(" ")
++      .includes("visible");
++    if (!hostHidesOverflow) {
++      hostElement.style.overflow = "hidden";
++    }
+ 
+     // Wait for a layout flush, then find the bounds.
+     let {
+@@ -344,7 +349,9 @@ export class PanelList extends HTMLElement {
+       // Set the alignments and show the panel.
+       this.setAttribute("align", align);
+       this.setAttribute("valign", valign);
+-      hostElement.style.overflow = "";
++      if (!hostHidesOverflow) {
++        hostElement.style.overflow = "";
++      }
+       // Decide positioning based on where this panel will be rendered
+       const offsetParentIsBody =
+         this.supportsPopover() ||

src/toolkit/themes/shared/design-system/dist/tokens-shared-css.patch

@@ -1,5 +1,5 @@
 diff --git a/toolkit/themes/shared/design-system/dist/tokens-shared.css b/toolkit/themes/shared/design-system/dist/tokens-shared.css
-index 15c0d98a18b4f19e7f2e03d2b78066b0353f416a..b32f6244c7a07e93894bab422691a605456034a1 100644
+index 63c641f560d4c0ce06b40a652ca99d1c48cd6941..39c81e773a442870763396e68fb57bd336e3625a 100644
 --- a/toolkit/themes/shared/design-system/dist/tokens-shared.css
 +++ b/toolkit/themes/shared/design-system/dist/tokens-shared.css
 @@ -7,6 +7,8 @@
@@ -11,7 +11,22 @@ index 15c0d98a18b4f19e7f2e03d2b78066b0353f416a..b32f6244c7a07e93894bab422691a605
  @layer tokens-foundation {
    :root,
    :host(.anonymous-content-host) {
-@@ -424,8 +426,8 @@
+@@ -28,10 +30,10 @@
+     --border-color-selected: var(--color-accent-primary);
+     --border-color-transparent: transparent;
+     --border-radius-circle: 9999px;
+-    --border-radius-xsmall: 2px;
+-    --border-radius-small: 4px;
+-    --border-radius-medium: 8px;
+-    --border-radius-large: 16px;
++    --border-radius-xsmall: calc(2px * var(--zen-squircle-value));
++    --border-radius-small: calc(4px * var(--zen-squircle-value));
++    --border-radius-medium: calc(8px * var(--zen-squircle-value));
++    --border-radius-large: calc(16px * var(--zen-squircle-value));
+     --border-width: 1px;
+ 
+     /** box-shadow **/
+@@ -477,8 +479,8 @@
      --panel-background-color-dimmed-further: var(--background-color-dimmed-further);
      --panel-border-color: light-dark(rgb(240, 240, 244), rgb(82, 82, 94));
      --panel-border-radius: var(--border-radius-medium);

src/widget/cocoa/nsCocoaWindow-h.patch

@@ -1,8 +1,8 @@
 diff --git a/widget/cocoa/nsCocoaWindow.h b/widget/cocoa/nsCocoaWindow.h
-index 312011c1c2ac41e78affecbdef25d72766a7c882..e5865c7d6259f0a3df48edf7a26b1b75a23cdb3a 100644
+index 22a2a7ef3a5e9257c8bb00ba6a55e8d39d2abbd9..6d8353fd11921585f7101f5717bdb3dd8f2a5eae 100644
 --- a/widget/cocoa/nsCocoaWindow.h
 +++ b/widget/cocoa/nsCocoaWindow.h
-@@ -462,6 +462,10 @@ class nsCocoaWindow final : public nsIWidget {
+@@ -461,6 +461,10 @@ class nsCocoaWindow final : public nsIWidget {
    void SetHideTitlebarSeparator(bool) override;
    bool IsMacTitlebarDirectionRTL() override;
    void SetCustomTitlebar(bool) override;
@@ -13,9 +13,9 @@ index 312011c1c2ac41e78affecbdef25d72766a7c882..e5865c7d6259f0a3df48edf7a26b1b75
    void UpdateThemeGeometries(
        const nsTArray<ThemeGeometry>& aThemeGeometries) override;
    void LockAspectRatio(bool aShouldLock) override;
-@@ -672,6 +676,7 @@ class nsCocoaWindow final : public nsIWidget {
+@@ -674,6 +678,7 @@ class nsCocoaWindow final : public nsIWidget {
-   bool mAspectRatioLocked = false;
+   // show (e.g. a window created by detaching a tab from a fullscreen window).
-   bool mIsAlert = false;  // True if this is an non-native alert window.
+   bool mIsInitialFullscreenSuppressed = false;
    bool mWasShown = false;
 +  bool mIsBrowserWindow = false;
  

src/widget/gtk/nsDragSessionSource-cpp.patch

@@ -0,0 +1,29 @@
+diff --git a/widget/gtk/nsDragSessionSource.cpp b/widget/gtk/nsDragSessionSource.cpp
+index a5f67d700f8c80d513f08cc25405b57cf28a2a9a..58186470bcbb7b1eda34ee20a19e29d540ab052a 100644
+--- a/widget/gtk/nsDragSessionSource.cpp
++++ b/widget/gtk/nsDragSessionSource.cpp
+@@ -13,6 +13,7 @@
+ #include "mozilla/Services.h"
+ #include "mozilla/StaticPrefs_widget.h"
+ #include "mozilla/WidgetUtilsGtk.h"
++#include "mozilla/nsZenDragAndDrop.h"
+ #include "nsAppShell.h"
+ #include "nsArrayUtils.h"
+ #include "nsCRT.h"
+@@ -1196,11 +1197,15 @@ bool nsDragSessionSource::SetAlphaPixmap(SourceSurface* aSurface,
+       cairo_image_surface_get_stride(surf), SurfaceFormat::B8G8R8A8);
+   if (!dt) return false;
+ 
++  auto drag_translucency = DRAG_IMAGE_ALPHA_LEVEL;
++  if (auto zenDragAndDrop = zen::nsZenDragAndDrop::GetZenDragAndDropInstance()) {
++    drag_translucency = zenDragAndDrop->GetDragImageOpacity();
++  }
+   dt->ClearRect(Rect(0, 0, dragRect.width, dragRect.height));
+   dt->DrawSurface(
+       aSurface, Rect(0, 0, dragRect.width, dragRect.height),
+       Rect(0, 0, dragRect.width, dragRect.height), DrawSurfaceOptions(),
+-      DrawOptions(DRAG_IMAGE_ALPHA_LEVEL, CompositionOp::OP_SOURCE));
++      DrawOptions(drag_translucency, CompositionOp::OP_SOURCE));
+ 
+   cairo_surface_mark_dirty(surf);
+   cairo_surface_set_device_offset(surf, -aXOffset, -aYOffset);

src/zen/boosts/zen-boost-editor.inc.xhtml

@@ -49,9 +49,9 @@
     <vbox flex="1" id="zen-boost-filter-wrapper">
       <hbox class="zen-boost-color-picker-gradient zen-boost-panel-disabled">
         <button data-l10n-id="zen-boost-magic-theme" id="zen-boost-magic-theme" class="subviewbutton mod-button"></button>
-        <html:div id="zen-boost-color-picker-dot-primary" class="zen-boost-color-picker-dot"></html:div>
+        <html:div id="zen-boost-color-picker-dot-primary" class="zen-boost-color-picker-dot no-squircles"></html:div>
-        <html:div id="zen-boost-color-picker-dot-secondary" class="zen-boost-color-picker-dot"></html:div>
+        <html:div id="zen-boost-color-picker-dot-secondary" class="zen-boost-color-picker-dot no-squircles"></html:div>
-        <html:div class="zen-boost-color-picker-circle"></html:div>
+        <html:div class="zen-boost-color-picker-circle no-squircles"></html:div>
       </hbox>
 
       <hbox flex="1" id="zen-boost-toolbar-wrapper-colors">

src/zen/boosts/zen-boosts.css

@@ -194,7 +194,8 @@ body {
   max-height: 40px;
   align-items: center;
   background-color: var(--zen-boosts-secondary-background);
-  border: solid 1px var(--zen-boosts-primary-border-color);
+  border: solid 1px transparent;
+  border-bottom-color: var(--zen-boosts-primary-border-color);
 
   @media (-moz-windows-mica) {
     background-color: var(--zen-boosts-mica-background);

src/zen/common/modules/ZenStartup.mjs

@@ -4,6 +4,7 @@
 
 import checkForZenUpdates, {
   createWindowUpdateAnimation,
+  playWindowSweepAnimation,
 } from "chrome://browser/content/ZenUpdates.mjs";
 
 class ZenStartup {
@@ -195,6 +196,14 @@ class ZenStartup {
     checkForZenUpdates();
     return await createWindowUpdateAnimation();
   }
+
+  /**
+   * Entry point for privileged modules (e.g. the sync applier) to play the
+   * update sweep animation in this window.
+   */
+  playWindowSweepAnimation() {
+    return playWindowSweepAnimation();
+  }
 }
 
 window.gZenStartup = new ZenStartup();

src/zen/common/modules/ZenUIManager.mjs

@@ -493,6 +493,13 @@ window.gZenUIManager = {
   _clearTimeout: null,
   _lastTab: null,
 
+  _urlbarSessionCounter: 0,
+  _urlbarOwner: null,
+
+  _isOwner(closeSeq) {
+    return this._urlbarOwner === closeSeq;
+  },
+
   // Check if browser elements are in a valid state for tab operations
   _validateBrowserState() {
     // Check if browser window is still open
@@ -517,8 +524,15 @@ window.gZenUIManager = {
     werePassedURL,
     searchClipboard,
     where,
-    overridePreferance = false
+    overridePreferance = false,
+    closeToken = {}
   ) {
+    // Keep this here. It's better to make sure every
+    // call has a different token rather then forgetting
+    // to increment it in one of the early returns.
+    const closeSeq = ++this._urlbarSessionCounter;
+    closeToken.id = closeSeq;
+
     // Validate browser state first
     if (!this._validateBrowserState()) {
       console.warn("Browser state invalid for new tab operation");
@@ -529,6 +543,10 @@ window.gZenUIManager = {
       return false;
     }
 
+    if (document.documentElement.hasAttribute("zen-welcome-stage")) {
+      return false;
+    }
+
     const shouldOpenURLBar =
       overridePreferance ||
       (gZenVerticalTabsManager._canReplaceNewTab &&
@@ -542,7 +560,13 @@ window.gZenUIManager = {
 
     // Close the new tab popup on cmd/ctrl + t
     if (!overridePreferance && gURLBar.hasAttribute("zen-newtab")) {
-      this.handleUrlbarClose();
+      // The _zenHandleUrlbarClose holds a token in it's closure.
+      // Call that instead.
+      if (gURLBar._zenHandleUrlbarClose) {
+        gURLBar._zenHandleUrlbarClose();
+      } else {
+        this.handleUrlbarClose(closeSeq);
+      }
       return true;
     }
 
@@ -568,7 +592,9 @@ window.gZenUIManager = {
     this._prevUrlbarLabel = gURLBar._untrimmedValue || "";
 
     // Set up URL bar for new tab
-    gURLBar._zenHandleUrlbarClose = this.handleUrlbarClose.bind(this);
+    gURLBar._zenHandleUrlbarClose = (onSwitch, onElementPicked) =>
+      this.handleUrlbarClose(closeSeq, onSwitch, onElementPicked);
+    this._urlbarOwner = closeSeq;
     gURLBar.setAttribute("zen-newtab", true);
 
     // Update newtab buttons
@@ -582,18 +608,33 @@ window.gZenUIManager = {
       document.getElementById("Browser:OpenLocation").doCommand();
     } catch (e) {
       console.error("Error opening location in new tab:", e);
-      this.handleUrlbarClose(false);
+      this.handleUrlbarClose(closeSeq, false, false);
       return false;
     }
     return true;
   },
 
+  /**
+   * Check whether the closeToken given by handleNewTab
+   * corresponds to a close event.
+   *
+   * @param {object} closeToken - Token previously passed to handleNewTab.
+   * @param {CustomEvent} event - A ZenURLBarClosed event.
+   * @returns {boolean}
+   */
+  matchesCloseToken(closeToken, event) {
+    return (
+      typeof closeToken?.id === "number" &&
+      event?.detail?.closeSeq === closeToken.id
+    );
+  },
+
   clearUrlbarData() {
     this._prevUrlbarLabel = null;
     this._lastSearch = "";
   },
 
-  handleUrlbarClose(onSwitch = false, onElementPicked = false) {
+  handleUrlbarClose(closeSeq, onSwitch = false, onElementPicked = false) {
     // Validate browser state first
     if (!this._validateBrowserState()) {
       console.warn("Browser state invalid for URL bar close operation");
@@ -607,6 +648,9 @@ window.gZenUIManager = {
 
     const isFocusedBefore = gURLBar.focused;
     setTimeout(() => {
+      /* If someone else opened the url bar in the meantime don't be
+       * stingy and leave it open for them.*/
+      if (this._isOwner(closeSeq)) {
         // We use this attribute on Tabbrowser::addTab
         gURLBar.removeAttribute("zen-newtab");
 
@@ -652,14 +696,21 @@ window.gZenUIManager = {
         }
 
         gURLBar.handleRevert();
+      }
 
       if (isFocusedBefore) {
         setTimeout(() => {
           window.dispatchEvent(
             new CustomEvent("ZenURLBarClosed", {
-              detail: { onSwitch, onElementPicked },
+              detail: { onSwitch, onElementPicked, closeSeq },
             })
           );
+
+          if (!this._isOwner(closeSeq)) {
+            return;
+          }
+          this._urlbarOwner = null;
+
           gURLBar.view.close({ elementPicked: onElementPicked });
           gURLBar.updateTextOverflow();
 
@@ -683,6 +734,8 @@ window.gZenUIManager = {
             }
           }
         }, 0);
+      } else if (this._isOwner(closeSeq)) {
+        this._urlbarOwner = null;
       }
     }, 0);
   },
@@ -815,7 +868,6 @@ window.gZenUIManager = {
   },
 
   panelUIPosition(panel, anchor) {
-    void panel;
     // The alignment position of the panel is determined during the "popuppositioned" event
     // when the panel opens. The alignment positions help us determine in which orientation
     // the panel is anchored to the screen space.
@@ -1299,11 +1351,13 @@ window.gZenVerticalTabsManager = {
         document.documentElement.removeAttribute("zen-right-side");
       }
 
-      delete this._hadSidebarCollapse;
+      const wasSidebarExpanded = document.documentElement.hasAttribute(
-      if (isSidebarExpanded) {
-        this._hadSidebarCollapse = !document.documentElement.hasAttribute(
         "zen-sidebar-expanded"
       );
+      if (isSidebarExpanded !== wasSidebarExpanded) {
+        delete this._hadSidebarCollapse;
+        if (isSidebarExpanded) {
+          this._hadSidebarCollapse = true;
           this.navigatorToolbox.setAttribute("zen-sidebar-expanded", "true");
           document.documentElement.setAttribute("zen-sidebar-expanded", "true");
           gBrowser.tabContainer.setAttribute("expanded", "true");
@@ -1312,6 +1366,7 @@ window.gZenVerticalTabsManager = {
           document.documentElement.removeAttribute("zen-sidebar-expanded");
           gBrowser.tabContainer.removeAttribute("expanded");
         }
+      }
 
       const appContentNavbarContaienr = document.getElementById(
         "zen-appcontent-navbar-container"

src/zen/common/modules/ZenUpdates.mjs

@@ -61,6 +61,14 @@ export async function createWindowUpdateAnimation() {
     return;
   }
   Services.prefs.setStringPref(ZEN_BUILD_ID_PREF, appID);
+  await playWindowSweepAnimation();
+}
+
+/**
+ * Plays the full-window sweep shown after updates. Also used the first
+ * time incoming sync data is applied on this profile.
+ */
+export async function playWindowSweepAnimation() {
   await gZenWorkspaces.promiseInitialized;
   const appWrapper = document.getElementById("zen-main-app-wrapper");
   const element = document.createElement("div");

src/zen/common/styles/zen-buttons.css

@@ -27,7 +27,7 @@ dialog::part(dialog-button) {
 
   position: relative;
   border: none;
-  border-radius: 10px;
+  border-radius: calc(10px * var(--zen-squircle-value));
 }
 
 @media (-moz-platform: macos) {

src/zen/common/styles/zen-omnibox.css

@@ -18,11 +18,11 @@
 
 .urlbar {
   --urlbarview-separator-color: light-dark(hsl(0, 0%, 80%), hsl(0, 0%, 20%));
-  --urlbarview-background-color-hover: var(--toolbarbutton-hover-background);
+  --urlbarview-background-color-hover: var(--toolbarbutton-background-color-hover);
   border-radius: calc(var(--toolbarbutton-border-radius) - 2px);
-  height: var(--urlbar-height);
   --urlbarView-results-padding: 10px !important;
   --urlbar-container-height: 48px !important;
+  --urlbar-input-container-border: none;
 
   --urlbar-margin-inline: 5px;
   --urlbar-container-padding: 4px;
@@ -60,6 +60,9 @@
 .urlbar-background {
   background: var(--zen-toolbar-element-bg) !important;
   border-radius: var(--border-radius-medium);
+  :root:not([zen-single-toolbar="true"]) & {
+    border-radius: calc(var(--border-radius-medium) * var(--zen-squircle-value));
+  }
   outline: none !important;
 
   #urlbar:not([breakout-extend]) & {
@@ -136,8 +139,13 @@
 
   & #identity-box {
     margin-inline-end: 0 !important;
+
+    :root[zen-has-empty-tab="true"] &[pageproxystate="invalid"]:not(.chromeUI) {
+      margin-inline-end: -4px !important;
+    }
+
     &.chromeUI:not([pageproxystate="invalid"]) #identity-icon-box {
-      border-radius: 10px !important;
+      border-radius: calc(10px * var(--zen-squircle-value)) !important;
     }
   }
 
@@ -166,13 +174,9 @@
 }
 
 :root:not([zen-single-toolbar="true"]):not([zen-has-empty-tab="true"]) #urlbar:not([breakout-extend]) .urlbar-input-container {
-  padding: 2px 3px;
+  padding: 2px 5px;
   gap: 2px;
 
-  & .urlbar-page-action {
-    height: 100%;
-  }
-
   & #zen-copy-url-button {
     order: -1;
   }
@@ -291,7 +295,7 @@
 
   &,
   .urlbar-background {
-    border-radius: 12px !important;
+    border-radius: calc(12px * var(--zen-squircle-value)) !important;
   }
 
   &[breakout-extend][animate-searchmode="true"]::before {
@@ -326,6 +330,7 @@
     order: 2;
   }
 
+  /* stylelint-disable-next-line stylelint-plugin-mozilla/no-has-selector */
   #notification-popup-box:not([open]):not(:has(> [showing="true"])) {
     margin-inline-start: calc(-10px - 2 * var(--urlbar-icon-padding));
     opacity: 0;
@@ -346,7 +351,7 @@
       padding: 4px !important;
 
       &:hover {
-        background: var(--toolbarbutton-hover-background);
+        background: var(--toolbarbutton-background-color-hover);
         border-radius: var(--toolbarbutton-border-radius);
         overflow: visible;
       }
@@ -405,7 +410,7 @@
 }
 
 #notification-popup-box {
-  border-radius: 10px !important;
+  border-radius: calc(10px * var(--zen-squircle-value)) !important;
 }
 
 /* Border radius on hover */
@@ -487,9 +492,10 @@
   translate: -50% 0%;
   left: 50% !important;
 
+  /* stylelint-disable-next-line stylelint-plugin-mozilla/no-has-selector */
   #urlbar-container:has(&) {
     border-radius: var(--border-radius-medium);
-    background: var(--toolbarbutton-hover-background);
+    background: var(--toolbarbutton-background-color-hover);
     height: var(--urlbar-height) !important;
     margin-inline: 0.15rem !important;
     :root:not([zen-single-toolbar="true"]) & {
@@ -633,6 +639,7 @@
 
 #urlbar-label-box,
 #urlbar-search-mode-indicator {
+  --urlbar-basic-component-size: 18px;
   background-color: color-mix(in srgb, var(--zen-primary-color) 50%, light-dark(rgba(0, 0, 0, 0.5), rgba(255, 255, 255, 0.2)) 50%) !important;
   color: white;
   padding: 4px 8px;
@@ -698,7 +705,7 @@
 
 :root:not([zen-single-toolbar="true"]) #urlbar[breakout-extend]:not([zen-floating-urlbar="true"]) {
   & .urlbar-background {
-    border-radius: 10px !important;
+    border-radius: calc(10px * var(--zen-squircle-value)) !important;
   }
 
   #urlbar-results {
@@ -717,6 +724,10 @@
   display: none;
 }
 
+.urlbarView {
+  overflow: visible;
+}
+
 #urlbar-search-mode-indicator-title {
   font-weight: 600;
   padding: 0;

src/zen/common/styles/zen-panels/dialog.css

@@ -4,7 +4,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 .dialogBox {
-  border-radius: 12px !important;
+  border-radius: calc(12px * var(--zen-squircle-value)) !important;
   border: 0.5px solid light-dark(rgba(0, 0, 0, 0.4), var(--zen-dialog-background)) !important;
   outline: 1px solid light-dark(transparent, rgba(168, 168, 169, 0.50)) !important;
   box-shadow: 0 10px 8px rgba(0, 0 , 0, 0.15) !important;

src/zen/common/styles/zen-popup.css

@@ -335,7 +335,7 @@ menuseparator {
     gap: 8px;
     z-index: 1000;
     padding: var(--zen-toast-padding);
-    border-radius: 10px;
+    border-radius: 14px;
     background: linear-gradient(to bottom, var(--zen-primary-color) -40%, color-mix(in srgb, var(--zen-primary-color), #0f0f0f 20%));
     box-shadow: light-dark(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.4)) 0 0 22px 2px;
     border: none;
@@ -374,7 +374,7 @@ menuseparator {
       min-width: unset !important;
       min-height: 28px;
       margin: 0 !important;
-      border-radius: 6px !important;
+      border-radius: 10px !important;
       border-top: 2px solid light-dark(transparent, rgba(255, 255, 255, 0.1));
       color: light-dark(rgba(0, 0, 0, 0.8), rgba(255, 255, 255, 0.8)) !important;
       box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.05);

src/zen/common/styles/zen-sidebar-notification.css

@@ -78,13 +78,13 @@
 }
 
 .zen-sidebar-notification-progress {
-  height: 2px;
+  height: 1px;
   overflow: hidden;
   transform: translateY(-1px);
 
   & .zen-sidebar-notification-progress-bar {
     height: 100%;
-    background: light-dark(color-mix(in srgb, var(--zen-primary-color) 50%, black), color-mix(in srgb, var(--zen-colors-primary) 15%, #ebebeb));
+    background: light-dark(color-mix(in srgb, var(--zen-primary-color) 50%, black), color-mix(in srgb, var(--zen-colors-primary) 15%, transparent 10%, #6b6b6b));
     transform-origin: left center;
   }
 }

src/zen/common/styles/zen-single-components.css

@@ -185,7 +185,7 @@
 .toolbarbutton-1:not(#tabs-newtab-button),
 .urlbar-page-action,
 .identity-box-button {
-  --tab-border-radius: 6px;
+  --tab-border-radius: 8px;
   --toolbarbutton-border-radius: var(--tab-border-radius);
   --toolbarbutton-padding-inner: 6px;
   --toolbarbutton-padding-outer: 1px;
@@ -291,7 +291,7 @@
   --panel-width: 234px;
   --menu-panel-width-wide: calc(var(--panel-width) - var(--panel-padding) * 2);
   --uei-icon-size: 16px;
-  --arrowpanel-menuitem-border-radius: 10px;
+  --arrowpanel-menuitem-border-radius: calc(10px * var(--zen-squircle-value));
 }
 
 #unified-extensions-empty-state,
@@ -500,13 +500,16 @@
     transition:
       transform 0.12s ease-in-out,
       opacity 0.12s ease-in-out;
+    will-change: transform;
   }
 
+  /* stylelint-disable-next-line stylelint-plugin-mozilla/no-has-selector */
   .permission-popup-permission-item:hover &::before,
   .permission-popup-boost-item:hover:not(:has(.zen-permission-popup-boost-editor-button:hover)) &::before {
     transform: scale(1.05);
   }
 
+  /* stylelint-disable-next-line stylelint-plugin-mozilla/no-has-selector */
   .permission-popup-permission-item:active:hover &::before,
   .permission-popup-boost-item:active:hover:not(:has(.zen-permission-popup-boost-editor-button:hover)) &::before {
     transform: scale(0.95);
@@ -601,6 +604,8 @@
       position: absolute;
       width: 100%;
       height: 100%;
+      will-change: transform;
+
       @media (-moz-platform: macos) {
         background: linear-gradient(to bottom, light-dark(rgb(255, 255, 255), rgb(34, 34, 34)), light-dark(rgb(246, 246, 246), rgb(21, 21, 21)));
 

src/zen/common/styles/zen-theme.css

@@ -92,7 +92,11 @@
   --in-content-accent-color-active: currentColor !important;
 
   /* This is like the secondary button */
-  --in-content-button-background: transparent !important;
+  --in-content-button-background: color-mix(
+    in srgb,
+    currentColor,
+    transparent 90%
+  ) !important;
   --in-content-button-text-color: var(--zen-secondary-btn-color) !important;
   --in-content-button-background-hover: color-mix(
     in srgb,
@@ -164,7 +168,7 @@
     --zen-toolbar-height-with-bookmarks: calc(var(--zen-toolbar-height) + 30px);
   }
 
-  --toolbarbutton-hover-background: var(--zen-toolbar-element-bg-hover) !important;
+  --toolbarbutton-background-color-hover: var(--zen-toolbar-element-bg-hover) !important;
   --zen-toolbar-button-size: 16px;
   @media (-moz-platform: macos) {
     --zen-toolbar-button-size: 17px;
@@ -177,7 +181,7 @@
     * background on the native theme. */
   --toolbar-background-color: light-dark(rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.15));
 
-  --toolbarbutton-active-background: color-mix(
+  --toolbarbutton-background-color-active: color-mix(
     in srgb,
     var(--zen-branding-bg-reverse) 7%,
     transparent 93%
@@ -187,9 +191,9 @@
   --toolbox-textcolor-inactive: var(--toolbox-textcolor) !important;
 
   /* Other colors */
-  --urlbar-box-active-bgcolor: var(--toolbarbutton-hover-background) !important;
+  --urlbar-box-active-bgcolor: var(--toolbarbutton-background-color-hover) !important;
   --zen-input-border-color: light-dark(rgb(204, 204, 204), rgb(66, 65, 77));
-  --urlbar-box-hover-bgcolor: var(--toolbarbutton-hover-background) !important;
+  --urlbar-box-hover-bgcolor: var(--toolbarbutton-background-color-hover) !important;
   --input-text-background-color: light-dark(rgba(255, 255, 255, 0.2), rgba(0, 0, 0, 0.2)) !important;
   --toolbar-field-focus-background-color: light-dark(
     rgba(255, 255, 255, 0.25),
@@ -213,6 +217,16 @@
   --toolbarbutton-border-radius: 6px;
   --urlbar-margin-inline: 1px !important;
 
+  --zen-squircle-value: 1.3;
+
+  @media (-moz-platform: windows) {
+    --zen-squircle-value: 2.1;
+  }
+
+  @media (-moz-platform: linux) {
+    --zen-squircle-value: 1.2;
+  }
+
   --tab-icon-overlay-stroke: light-dark(white, black) !important;
   --tab-close-button-padding: 4px !important;
 
@@ -253,7 +267,7 @@
   --zen-active-tab-scale: 0.985;
 
   /* Define tab hover background color */
-  --tab-background-color-hover: var(--toolbarbutton-hover-background);
+  --tab-background-color-hover: var(--toolbarbutton-background-color-hover);
 
   /* Sidebar Notifications */
   --zen-sidebar-notification-bg: color-mix(
@@ -272,7 +286,7 @@
        * 1. If the native radius - the separation is less than 4px, use 4px.
        * 2. Otherwise, use the the calculated value (inner radius = outer radius - separation).
      */
-      max(5px, calc(var(--zen-border-radius) - var(--zen-element-separation) / 2))
+      max(5px, calc((var(--zen-border-radius) - var(--zen-element-separation) / 2) * var(--zen-squircle-value)))
   );
 
   /** Other theme-related styles */
@@ -344,3 +358,11 @@
 }
 
 %include zen-buttons.css
+
+@media (-moz-pref('layout.css.corner-shape.enabled')) {
+  *:not(.no-squircles),
+  .zen-squircle-before::before,
+  .zen-squircle-after::after {
+    corner-shape: superellipse(var(--zen-squircle-value));
+  }
+}

src/zen/common/zenThemeModifier.js

@@ -109,7 +109,7 @@
         if (AppConstants.platform == "macosx") {
           const targetRadius = window.matchMedia("(-moz-mac-tahoe-theme)")
             .matches
-            ? 14
+            ? 12
             : 10;
           document.documentElement.style.setProperty(
             "--zen-border-radius",

src/zen/compact-mode/ZenCompactMode.mjs

@@ -832,8 +832,9 @@ window.gZenCompactModeManager = {
 
       const onLeave = event => {
         if (AppConstants.platform == "macosx") {
-          const buttonRect =
+          const buttonRect = window.windowUtils.getBoundsWithoutFlushing(
-            gZenVerticalTabsManager.actualWindowButtons.getBoundingClientRect();
+            gZenVerticalTabsManager.actualWindowButtons
+          );
           const MAC_WINDOW_BUTTONS_X_BORDER = buttonRect.width + buttonRect.x;
           const MAC_WINDOW_BUTTONS_Y_BORDER = buttonRect.height + buttonRect.y;
           if (

src/zen/compact-mode/sidebar.inc.css

@@ -58,7 +58,7 @@
     :root[zen-no-padding='true'] & {
       --zen-compact-float: 10px;
       --zen-compact-top-toolbar-hidden-fix: var(--zen-compact-float);
-      --zen-compact-mode-no-padding-radius-fix: 2px;
+      --zen-compact-mode-no-padding-radius-fix: 6px;
     }
 
     /* Initial padding for when we are animating */

src/zen/compact-mode/zen-compact-mode.css

@@ -29,7 +29,7 @@
   &,
   &::before,
   &::after {
-    border-radius: calc(var(--zen-native-inner-radius) - var(--zen-compact-mode-no-padding-radius-fix, 0px));
+    border-radius: calc((var(--zen-native-inner-radius) - var(--zen-compact-mode-no-padding-radius-fix, 0px)) * var(--zen-squircle-value));
   }
 }
 

src/zen/drag-and-drop/ZenDragAndDrop.js

@@ -183,10 +183,10 @@
           if (tabClone.hasAttribute("visuallyselected")) {
             tabClone.style.transform = "translate(-50%, -50%)";
           }
-        } else if (AppConstants.platform !== "macosx" && !tab.isZenFolder) {
+        } else if (AppConstants.platform == "win" && !tab.isZenFolder) {
-          // On windows and linux, we still don't add some extra opaqueness
+          // On windows, the shell applies its own translucency to the drag
-          // for the tab to be more visible. This is a hacky workaround.
+          // image which we can't control, so force some extra contrast for
-          // TODO: Make windows and linux DnD use nsZenDragAndDrop::mDragImageOpacity
+          // the tab to be more visible. This is a hacky workaround.
           tabClone.style.colorScheme = "light";
           tabClone.style.setProperty("--tab-selected-textcolor", "black");
         }

src/zen/folders/ZenFolder.mjs

@@ -12,7 +12,7 @@ export class nsZenFolder extends MozTabbrowserTabGroup {
   #initialized = false;
 
   static markup = `
-      <hbox class="tab-group-label-container zen-drop-target" pack="center">
+      <hbox class="tab-group-label-container zen-squircle-before zen-drop-target" pack="center">
         <html:div class="tab-group-folder-icon"/>
         <label class="tab-group-label" role="button"/>
         <image class="tab-reset-button reset-icon" role="button" keyNav="false" data-l10n-id="zen-folders-unload-all-tooltip"/>

src/zen/glance/zen-glance.css

@@ -41,11 +41,11 @@
 
     &:hover {
       background: light-dark(rgb(41, 41, 41), rgb(204, 204, 204));
-      scale: 1.05;
+      scale: 1.02;
     }
 
     &:hover:active {
-      scale: 0.95;
+      scale: 0.98;
     }
 
     & label {

src/zen/glance/zen-glance.inc.xhtml

@@ -4,8 +4,8 @@
 
 <html:template id="zen-glance-sidebar-template">
   <vbox class="zen-glance-sidebar-container">
-    <toolbarbutton class="zen-glance-sidebar-close toolbarbutton-1" command="cmd_zenGlanceClose" data-l10n-id="zen-general-confirm" />
+    <toolbarbutton class="no-squircles zen-glance-sidebar-close toolbarbutton-1" command="cmd_zenGlanceClose" data-l10n-id="zen-general-confirm" />
-    <toolbarbutton class="zen-glance-sidebar-open toolbarbutton-1" command="cmd_zenGlanceExpand" />
+    <toolbarbutton class="no-squircles zen-glance-sidebar-open toolbarbutton-1" command="cmd_zenGlanceExpand" />
-    <toolbarbutton class="zen-glance-sidebar-split toolbarbutton-1" command="cmd_zenGlanceSplit" />
+    <toolbarbutton class="no-squircles zen-glance-sidebar-split toolbarbutton-1" command="cmd_zenGlanceSplit" />
   </vbox>
 </html:template>

src/zen/images/favicons/tuta.svg

@@ -3,8 +3,7 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/.
    -->
-<?xml version="1.0" encoding="UTF-8"?>
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="192" height="192" viewBox="0 0 192 192">
-<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="192" height="192">
 <path d="M0 0 C46.53 0 93.06 0 141 0 C140.31337286 6.17964422 139.55249061 11.27288504 137.70605469 17.05029297 C137.47297387 17.80257864 137.23989305 18.55486431 136.99974918 19.32994652 C136.23144234 21.80315256 135.45168558 24.27258703 134.671875 26.7421875 C134.12437759 28.49738282 133.57765617 30.25282037 133.03166199 32.00848389 C131.87637142 35.71831589 130.71622139 39.42657597 129.55197144 43.13360596 C127.74764855 48.8788063 125.95370897 54.62720979 124.16235352 60.37646484 C123.86778165 61.32180147 123.57320978 62.2671381 123.26971149 63.24112129 C122.67820023 65.13942545 122.08671887 67.03773892 121.49526787 68.93606186 C120.61596105 71.75702774 119.73559404 74.57766091 118.85499573 77.39822388 C113.93371601 93.16794093 109.12231506 108.96839561 104.39160156 124.79638672 C104.15798416 125.57612854 103.92436676 126.35587036 103.68367004 127.15924072 C103.08515835 129.15844483 102.48956633 131.15852242 101.89428711 133.15869141 C101 136 101 136 100 138 C53.47 138 6.94 138 -41 138 C-40.30154873 133.1108411 -39.57595592 129.15411541 -38.15258789 124.53222656 C-37.57916405 122.65642914 -37.57916405 122.65642914 -36.99415588 120.74273682 C-36.57039663 119.37534329 -36.14656076 118.0079735 -35.72265625 116.640625 C-35.27348999 115.1778587 -34.82480765 113.71494372 -34.37657166 112.25189209 C-33.18301778 108.36047716 -31.98331296 104.47098593 -30.78216553 100.58190918 C-29.63602455 96.86810525 -28.49491032 93.15276556 -27.35351562 89.4375 C-24.23585848 79.29161092 -21.11791678 69.14580929 -18 59 C-12.06 39.53 -6.12 20.06 0 0 Z " fill="#C00002" transform="translate(51,54)"/>
 <path d="M0 0 C18.3328319 -0.77792059 36.66127963 -1.35606988 55.00715542 -1.70980167 C63.53040721 -1.87858134 72.04320263 -2.10845198 80.55981445 -2.48950195 C142.46067644 -5.20608208 142.46067644 -5.20608208 159.53827381 9.52021503 C166.76889916 16.3955246 173.28323862 24.18336817 178 33 C178 34.32 178 35.64 178 37 C159.57187597 37.07007601 141.14378652 37.12298126 122.71555805 37.15543652 C114.15904092 37.17090649 105.60260658 37.19199848 97.04614258 37.22631836 C89.58846853 37.25621675 82.13085443 37.27557406 74.67312211 37.28226548 C70.72416302 37.28617701 66.77537545 37.29537225 62.82647133 37.31719017 C59.10909816 37.33756234 55.39196707 37.34383237 51.67454338 37.33932304 C49.66086617 37.34054104 47.64721527 37.35667936 45.63360596 37.3732605 C44.43192276 37.36913651 43.23023956 37.36501251 41.99214172 37.36076355 C40.42831993 37.36491162 40.42831993 37.36491162 38.83290577 37.36914349 C32.93264951 36.60030705 29.62184448 32.77709579 25.875 28.5 C19.58131594 21.47164064 12.89888852 14.86095567 6.14794922 8.2734375 C5.35146973 7.48839844 4.55499023 6.70335937 3.734375 5.89453125 C3.01475586 5.19175049 2.29513672 4.48896973 1.55371094 3.76489258 C0 2 0 2 0 0 Z " fill="#C00002" transform="translate(14,0)"/>
 <path d="M0 0 C3.791582 0.9478955 4.61038031 1.2276371 7.22387695 3.72460938 C7.82742508 4.29610718 8.43097321 4.86760498 9.05281067 5.4564209 C9.69151596 6.0792395 10.33022125 6.70205811 10.98828125 7.34375 C11.65087448 7.98687134 12.31346771 8.62999268 12.99613953 9.29260254 C14.39307302 10.6568359 15.78562095 12.02557232 17.17407227 13.3984375 C19.30020941 15.4879213 21.45839054 17.54016287 23.61914062 19.59375 C24.97349069 20.92491308 26.32577572 22.25818109 27.67578125 23.59375 C28.64902092 24.50368713 28.64902092 24.50368713 29.641922 25.43200684 C32.90021798 28.73979232 33.96335392 30.20963715 34.18457031 34.98071289 C32.79621492 42.01530122 30.50352034 48.87563397 28.37109375 55.71484375 C27.89774106 57.25373642 27.42510459 58.79284955 26.95314026 60.33216858 C25.70895014 64.38330864 24.4551733 68.43141814 23.19927979 72.47894287 C21.95200374 76.50438366 20.71357304 80.53254149 19.47460938 84.56054688 C18.02569311 89.27038853 16.5746843 93.97953307 15.11288452 98.68539429 C12.90227206 105.80473144 10.71371664 112.92808223 8.60595703 120.07861328 C8.0605703 121.91064049 8.0605703 121.91064049 7.50416565 123.77967834 C6.83459768 126.03485094 6.17462453 128.29290282 5.52598572 130.55418396 C5.23389725 131.5321846 4.94180878 132.51018524 4.64086914 133.51782227 C4.39422012 134.36594986 4.14757111 135.21407745 3.89344788 136.08790588 C3.59861008 136.71889694 3.30377228 137.349888 3 138 C2.01 138.33 1.02 138.66 0 139 C0 93.13 0 47.26 0 0 Z " fill="#C00002" transform="translate(0,15)"/>

src/zen/live-folders/ZenLiveFoldersManager.sys.mjs

@@ -200,6 +200,50 @@ class nsZenLiveFoldersManager {
     return this.liveFolders.get(id);
   }
 
+  /**
+   * Returns the provider config needed to recreate this live folder on
+   * another device, or null for non-live folders. Fetch bookkeeping fields
+   * are stripped since they are device-local.
+   *
+   * @param {string} id - The folder ID.
+   */
+  getSyncableFolderData(id) {
+    const liveFolder = this.liveFolders.get(id);
+    if (!liveFolder) {
+      return null;
+    }
+    const state = { ...liveFolder.serialize().state };
+    delete state.lastFetched;
+    delete state.lastErrorId;
+    return { type: liveFolder.constructor.type, state };
+  }
+
+  /**
+   * Registers a live folder provider for a folder that arrived from
+   * Firefox Sync. The folder element must already exist.
+   *
+   * @param {string} id - The folder ID.
+   * @param {{ type: string, state: object }} config - Synced provider config.
+   */
+  async adoptSyncedFolder(id, { type, state } = {}) {
+    await this.stateRestored.promise;
+    if (this.liveFolders.has(id)) {
+      return;
+    }
+    const ProviderClass = this.registry.get(type);
+    if (!ProviderClass || !state) {
+      return;
+    }
+    const liveFolder = new ProviderClass({
+      id,
+      state: this.#applyDefaultStateValues({ ...state }),
+      manager: this,
+    });
+    this.liveFolders.set(id, liveFolder);
+    liveFolder.start();
+    this.saveState();
+  }
+
   async createFolder(type) {
     const [provider, providerType] = type.split(":");
     let ProviderClass = this.registry.get(provider);
@@ -324,7 +368,7 @@ class nsZenLiveFoldersManager {
               },
             ],
             content: {
-              width: "310px",
+              width: "312px",
               position: "callout",
               title_logo: {
                 imageURL: icon,
@@ -619,6 +663,7 @@ class nsZenLiveFoldersManager {
   async #restoreState() {
     let data = await this.#readStateFromDisk();
     if (!Array.isArray(data)) {
+      this.stateRestored.resolve();
       return;
     }
 

src/zen/live-folders/providers/GithubLiveFolder.sys.mjs

@@ -26,7 +26,8 @@ export class nsGithubLiveFolderProvider extends nsZenLiveFolderProvider {
       const hasAnyFilterEnabled =
         (this.state.options.authorMe ?? false) ||
         (this.state.options.assignedMe ?? true) ||
-        (this.state.options.reviewRequested ?? false);
+        (this.state.options.reviewRequested ?? false) ||
+        (this.state.options.includeDrafts ?? true);
 
       if (!hasAnyFilterEnabled) {
         return "zen-live-folder-github-no-filter";

src/zen/media/ZenMediaController.mjs

@@ -346,7 +346,7 @@ class ZenMediaCard {
 
   onToggle() {
     if (this.controller?.isPlaying) {
-      this.controller.pause();
+      this.controller.pause("user");
     } else {
       this.controller?.play();
     }
@@ -365,7 +365,7 @@ class ZenMediaCard {
   }
 
   onSeekDrag(event) {
-    this.controller?.pause();
+    this.controller?.pause("user");
     const newTime = (event.target.value / 100) * this.duration;
     this.currentTimeEl.textContent = this.formatSecondsToTime(newTime);
   }
@@ -408,7 +408,7 @@ class ZenMediaCard {
 
   onClose() {
     if (this.controller) {
-      this.controller.pause();
+      this.controller.pause("user");
     } else {
       const webRTC =
         this.browser.browsingContext.currentWindowGlobal.getActor("WebRTC");

src/zen/sessionstore/ZenSessionManager.sys.mjs

@@ -10,7 +10,6 @@ const lazy = {};
 ChromeUtils.defineESModuleGetters(lazy, {
   ZenLiveFoldersManager:
     "resource:///modules/zen/ZenLiveFoldersManager.sys.mjs",
-  ZenSyncStore: "resource:///modules/zen/ZenSyncManager.sys.mjs",
   PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.sys.mjs",
   SessionStore: "resource:///modules/sessionstore/SessionStore.sys.mjs",
   SessionStartup: "resource:///modules/sessionstore/SessionStartup.sys.mjs",
@@ -611,7 +610,9 @@ export class nsZenSessionManager {
       }
     );
     this.#collectWindowData(windows);
-    lazy.ZenSyncStore.notifyAboutChanges();
+    // Let interested consumers (e.g. Firefox Sync) know fresh sidebar data
+    // is available, without this module knowing anything about them.
+    Services.obs.notifyObservers(null, "zen-sidebar-data-collected");
     // This would save the data to disk asynchronously or when quitting the app.
     let sidebar = this.#sidebarWithoutCloning;
     this.#file.data = sidebar;

src/zen/sessionstore/ZenWindowSync.sys.mjs

@@ -606,7 +606,9 @@ class nsZenWindowSync {
     if (isTab) {
       if (originalIsEssential !== targetIsEssential) {
         if (originalIsEssential) {
-          gZenPinnedTabManager.addToEssentials(aTargetItem);
+          gZenPinnedTabManager.addToEssentials(aTargetItem, {
+            replicating: true,
+          });
         } else {
           gZenPinnedTabManager.removeEssentials(
             aTargetItem,
@@ -1232,7 +1234,7 @@ class nsZenWindowSync {
       activeIndex = Math.min(activeIndex, entries.length - 1);
       activeIndex = Math.max(activeIndex, 0);
       let entryToUse = (entries[activeIndex] || entries[0]) ?? null;
-      this.#setPinnedInitialState(
+      this.setPinnedInitialState(
         aTab,
         { url: entryToUse?.url, title: entryToUse?.title },
         image
@@ -1250,14 +1252,22 @@ class nsZenWindowSync {
    */
   setPinnedUrl(aTab, aUrl, aImage) {
     this.log(`Setting pinned url for tab ${aTab.id}`);
-    this.#setPinnedInitialState(
+    this.setPinnedInitialState(
       aTab,
       { url: aUrl, title: aTab.zenStaticLabel },
       aImage
     );
   }
 
-  #setPinnedInitialState(aTab, aEntry, aImage) {
+  /**
+   * Sets the pinned initial state (canonical entry and icon) for a tab's
+   * instances across all windows.
+   *
+   * @param {object} aTab - Any window's instance of the tab.
+   * @param {object} aEntry - The canonical { url, title } entry.
+   * @param {string} [aImage] - Optional icon to store.
+   */
+  setPinnedInitialState(aTab, aEntry, aImage) {
     const initialState = { entry: aEntry, image: aImage };
     this.#runOnAllWindows(null, win => {
       const targetTab = this.getItemFromWindow(win, aTab.id);
@@ -1362,7 +1372,9 @@ class nsZenWindowSync {
       return;
     }
     tab._zenContentsVisible = true;
+    if (!tab.id) {
       tab.id = this.#newTabSyncId;
+    }
     if (lazy.gSyncOnlyPinnedTabs && !tab.pinned) {
       return;
     }

src/zen/space-routing/ZenSpaceRoutingManager.sys.mjs

@@ -27,7 +27,7 @@ class nsZenSpaceRoutingManager {
     const element = window.MozXULElement.parseXULToFragment(`
         <menuseparator/>
         <menuitem id="context_zen-add-domain-to-routing"
-                  data-lazy-l10n-id="tab-context-zen-add-domain-to-sr"
+                  data-l10n-id="tab-context-zen-add-domain-to-sr"
                   data-l10n-args='{"tabCount": 1}'/>
       `);
     window.document.getElementById("context_undoCloseTab").after(element);

src/zen/spaces/ZenGradientGenerator.mjs

@@ -353,7 +353,7 @@ export class nsZenThemePicker extends nsZenMultiWindowFeature {
     // Add elements in a circular pattern, where the center is the center of the wrapper
     for (let i = 0; i < 16; i++) {
       const dot = document.createElement("div");
-      dot.classList.add("zen-theme-picker-texture-dot");
+      dot.classList.add("zen-theme-picker-texture-dot", "no-squircles");
       const position = (i / 16) * Math.PI * 2 + wrapperWidth;
       dot.style.left = `${Math.cos(position) * 50 + 50}%`;
       dot.style.top = `${Math.sin(position) * 50 + 50}%`;
@@ -361,6 +361,7 @@ export class nsZenThemePicker extends nsZenMultiWindowFeature {
     }
     this._textureHandler = document.createElement("div");
     this._textureHandler.id = "PanelUI-zen-gradient-generator-texture-handler";
+    this._textureHandler.classList.add("no-squircles");
     this._textureHandler.addEventListener(
       "mousedown",
       this.onTextureHandlerMouseDown.bind(this)
@@ -598,7 +599,7 @@ export class nsZenThemePicker extends nsZenMultiWindowFeature {
         color.position || this.calculateInitialPosition([r, g, b]);
       const dotPad = this.panel.querySelector(".zen-theme-picker-gradient");
 
-      dot.classList.add("zen-theme-picker-dot");
+      dot.classList.add("zen-theme-picker-dot", "no-squircles");
 
       dot.style.left = `${x}px`;
       dot.style.top = `${y}px`;
@@ -720,7 +721,7 @@ export class nsZenThemePicker extends nsZenMultiWindowFeature {
     };
 
     const dot = document.createElement("div");
-    dot.classList.add("zen-theme-picker-dot");
+    dot.classList.add("zen-theme-picker-dot", "no-squircles");
 
     dot.style.left = `${dotData.x}px`;
     dot.style.top = `${dotData.y}px`;

src/zen/spaces/ZenSpace.mjs

@@ -52,7 +52,7 @@ export class nsZenWorkspace extends MozXULElement {
 
   static get markup() {
     return `
-        <vbox class="zen-workspace-tabs-section zen-current-workspace-indicator zen-drop-target" flex="1" context="zenWorkspaceMoreActions">
+        <vbox class="zen-workspace-tabs-section zen-current-workspace-indicator zen-squircle-before zen-drop-target" flex="1" context="zenWorkspaceMoreActions">
           <stack class="zen-current-workspace-indicator-stack">
             <image class="zen-current-workspace-indicator-chevron" />
             <hbox class="zen-current-workspace-indicator-icon" />
@@ -287,6 +287,12 @@ export class nsZenWorkspace extends MozXULElement {
 
     this.addEventListener("TabPinned", tabPinCallback);
     this.addEventListener("TabUnpinned", tabPinCallback);
+    this.addEventListener("TabGroupRemovedFromDOM", () => {
+      // Wait for the group to be removed from the DOM.
+      setTimeout(() => {
+        tabPinCallback();
+      });
+    });
     this.addEventListener("TabClose", event => {
       if (event.target.pinned) {
         tabPinCallback();

src/zen/spaces/ZenSpaceCreation.mjs

@@ -10,6 +10,7 @@ ChromeUtils.defineLazyGetter(lazy, "l10n", () => {
 
 class nsZenWorkspaceCreation extends MozXULElement {
   #wasInCollapsedMode = false;
+  #urlbarDimmed = false;
 
   promiseInitialized = new Promise(resolve => {
     this.resolveInitialized = resolve;
@@ -40,7 +41,7 @@ class nsZenWorkspaceCreation extends MozXULElement {
             </vbox>
             <vbox class="zen-workspace-creation-form">
               <hbox class="zen-workspace-creation-name-wrapper">
-                <toolbarbutton class="zen-workspace-creation-icon-label" />
+                <toolbarbutton class="zen-workspace-creation-icon-label zen-squircle-before" />
                 <html:input
                   class="zen-workspace-creation-name"
                   type="text"
@@ -89,6 +90,58 @@ class nsZenWorkspaceCreation extends MozXULElement {
     ];
   }
 
+  get #spaceSwitchDuration() {
+    return (
+      Services.prefs.getIntPref("zen.workspaces.switch-animation-duration") /
+      1000
+    );
+  }
+
+  #dimUrlbar() {
+    if (this.#urlbarDimmed || !gZenVerticalTabsManager._hasSetSingleToolbar) {
+      return;
+    }
+    this.#urlbarDimmed = true;
+    const animation = gZenUIManager.motion.animate(
+      gURLBar,
+      {
+        opacity: [1, 0],
+      },
+      {
+        duration: this.#spaceSwitchDuration,
+        type: "spring",
+        bounce: 0,
+      }
+    );
+    if (gReduceMotion) {
+      animation.complete();
+    }
+  }
+
+  #restoreUrlbar() {
+    if (!this.#urlbarDimmed) {
+      return;
+    }
+    this.#urlbarDimmed = false;
+    const animation = gZenUIManager.motion.animate(
+      gURLBar,
+      {
+        opacity: [0, 1],
+      },
+      {
+        duration: this.#spaceSwitchDuration,
+        type: "spring",
+        bounce: 0,
+      }
+    );
+    if (gReduceMotion) {
+      animation.complete();
+    }
+    animation.then(() => {
+      gURLBar.style.removeProperty("opacity");
+    });
+  }
+
   connectedCallback() {
     if (this.delayConnectedCallback()) {
       // If we are not ready yet, or if we have already connected, we
@@ -109,10 +162,6 @@ class nsZenWorkspaceCreation extends MozXULElement {
       ".zen-workspace-creation-cancel-button"
     );
 
-    for (const element of this.elementsToAnimate) {
-      element.style.opacity = 0;
-    }
-
     this.#wasInCollapsedMode =
       document.documentElement.getAttribute("zen-sidebar-expanded") !== "true";
 
@@ -124,11 +173,15 @@ class nsZenWorkspaceCreation extends MozXULElement {
       .getInterface(Ci.nsIAppWindow)
       .rollupAllPopups();
 
+    gURLBar.view.close();
+    gURLBar.handleRevert();
+    gURLBar.blur();
+
     this.handleZenWorkspacesChangeBind =
       this.handleZenWorkspacesChange.bind(this);
 
     for (const element of this.parentElement.children) {
-      if (element !== this) {
+      if (element !== this && !element.hidden) {
         element.hidden = true;
         this.#hiddenElements.push(element);
       }
@@ -207,48 +260,15 @@ class nsZenWorkspaceCreation extends MozXULElement {
     document.getElementById("zen-sidebar-splitter").style.pointerEvents =
       "none";
 
-    gZenUIManager.motion
-      .animate(
-        [gBrowser.tabContainer, gURLBar],
-        {
-          opacity: [1, 0],
-        },
-        {
-          duration: 0.3,
-          type: "spring",
-          bounce: 0,
-        }
-      )
-      .then(() => {
-        gBrowser.tabContainer.style.visibility = "collapse";
-        if (gZenVerticalTabsManager._hasSetSingleToolbar) {
-          document.getElementById("nav-bar").style.visibility = "collapse";
-        }
-        this.style.visibility = "visible";
     gZenCompactModeManager.getAndApplySidebarWidth({});
+    this.#dimUrlbar();
     this.resolveInitialized();
-        let animation = gZenUIManager.motion.animate(
-          this.elementsToAnimate,
-          {
-            y: [20, 0],
-            opacity: [0, 1],
-            filter: ["blur(2px)", "blur(0)"],
-          },
-          {
-            duration: 0.6,
-            type: "spring",
-            bounce: 0,
-            delay: gZenUIManager.motion.stagger(0.05, { startDelay: 0.2 }),
   }
-        );
+
-        if (gReduceMotion) {
+  disconnectedCallback() {
-          animation.complete();
+    if (gZenWorkspaces.creatingWorkspaceId === this.workspaceId) {
+      gZenWorkspaces.creatingWorkspaceId = null;
     }
-        animation.then(() => {
-          this.inputName.focus();
-          gZenWorkspaces.workspaceElement(this.workspaceId).hidden = false;
-        });
-      });
   }
 
   async onCreateButtonCommand() {
@@ -268,6 +288,7 @@ class nsZenWorkspaceCreation extends MozXULElement {
 
   async onCancelButtonCommand() {
     document.documentElement.removeAttribute("zen-creating-workspace");
+    this.#restoreUrlbar();
     await gZenWorkspaces.changeWorkspaceWithID(this.previousWorkspaceId);
   }
 
@@ -332,18 +353,21 @@ class nsZenWorkspaceCreation extends MozXULElement {
   }
 
   finishSetup() {
+    this.inputName.focus();
     gZenWorkspaces.addChangeListeners(this.handleZenWorkspacesChangeBind, {
       once: true,
     });
   }
 
   async handleZenWorkspacesChange() {
+    // The space we were living in has already slid away, no need to animate
+    // ourselves out of it.
+    await this.#cleanup({ animateOut: false });
     await gZenWorkspaces.removeWorkspace(this.workspaceId);
-    await this.#cleanup();
   }
 
-  async #cleanup() {
+  async #cleanup({ animateOut = true } = {}) {
-    if (!gReduceMotion) {
+    if (animateOut && !gReduceMotion && this.isConnected) {
       await gZenUIManager.motion.animate(
         this.elementsToAnimate.reverse(),
         {
@@ -352,10 +376,10 @@ class nsZenWorkspaceCreation extends MozXULElement {
           filter: ["blur(0)", "blur(2px)"],
         },
         {
-          duration: 0.4,
+          duration: 0.3,
           type: "spring",
           bounce: 0,
-          delay: gZenUIManager.motion.stagger(0.05),
+          delay: gZenUIManager.motion.stagger(0.03),
         }
       );
     }
@@ -377,21 +401,32 @@ class nsZenWorkspaceCreation extends MozXULElement {
 
     document.documentElement.removeAttribute("zen-creating-workspace");
 
-    gBrowser.tabContainer.style.visibility = "";
+    this.remove();
-    gBrowser.tabContainer.style.opacity = 0;
+    this.#restoreUrlbar();
-    if (gZenVerticalTabsManager._hasSetSingleToolbar) {
+
-      document.getElementById("nav-bar").style.visibility = "";
+    // Give the space back its own contents.
-      gURLBar.style.opacity = 0;
+    const revealedElements = this.#hiddenElements;
+    this.#hiddenElements = [];
+    for (const element of revealedElements) {
+      element.hidden = false;
     }
 
-    this.remove();
+    // Now that the form is gone the space owns its essentials again, so let
-
+    // it lay itself out before we fade everything back in.
     const workspace = gZenWorkspaces.getActiveWorkspace();
     gZenWorkspaces._organizeWorkspaceStripLocations(workspace);
     gZenWorkspaces.updateTabsContainers();
+    // The essentials were parked off screen while we were up, put them back.
+    gZenWorkspaces.resetEssentialsPosition();
 
-    await gZenUIManager.motion.animate(
+    if (animateOut && !gReduceMotion) {
-      [gBrowser.tabContainer, gURLBar],
+      const elementsToReveal = revealedElements.filter(
+        element => element?.isConnected
+      );
+      if (elementsToReveal.length) {
+        gZenUIManager.motion
+          .animate(
+            elementsToReveal,
             {
               opacity: [0, 1],
             },
@@ -400,18 +435,15 @@ class nsZenWorkspaceCreation extends MozXULElement {
               type: "spring",
               bounce: 0,
             }
-    );
+          )
-
+          .then(() => {
-    gBrowser.tabContainer.style.opacity = "";
+            for (const element of elementsToReveal) {
-    if (gZenVerticalTabsManager._hasSetSingleToolbar) {
+              element.style.removeProperty("opacity");
-      gURLBar.style.opacity = "";
+            }
+          });
+      }
     }
 
-    for (const element of this.#hiddenElements) {
-      element.hidden = false;
-    }
-
-    this.#hiddenElements = [];
     gZenUIManager.updateTabsToolbar();
   }
 }

src/zen/spaces/ZenSpaceManager.mjs

@@ -11,7 +11,6 @@ const lazy = {};
 
 ChromeUtils.defineESModuleGetters(lazy, {
   ZenSessionStore: "resource:///modules/zen/ZenSessionManager.sys.mjs",
-  ZenSyncStore: "resource:///modules/zen/ZenSyncManager.sys.mjs",
 });
 
 ChromeUtils.defineLazyGetter(lazy, "browserBackgroundElement", () => {
@@ -41,6 +40,13 @@ class nsZenWorkspaces {
   #inChangingWorkspace = false;
   draggedElement = null;
 
+  /**
+   * The space currently showing the creation form, if any. It shows the form
+   * instead of tabs and essentials, so it never owns an essentials section.
+   * Cleared by the form element once it is removed from the DOM.
+   */
+  creatingWorkspaceId = null;
+
   #hasInitialized = false;
 
   #canDebug = Services.prefs.getBoolPref("zen.workspaces.debug", false);
@@ -157,11 +163,28 @@ class nsZenWorkspaces {
         this._invalidateBookmarkContainers();
       };
       Services.obs.addObserver(observerFunction, "workspace-bookmarks-updated");
+      const onContainerDeleted = subject => {
+        const userContextId = subject?.wrappedJSObject?.userContextId;
+        for (const workspace of this.getWorkspaces()) {
+          if (workspace.containerTabId === userContextId) {
+            workspace.containerTabId = 0;
+            this.saveWorkspace(workspace);
+          }
+        }
+      };
+      Services.obs.addObserver(
+        onContainerDeleted,
+        "contextual-identity-deleted"
+      );
       window.addEventListener("unload", () => {
         Services.obs.removeObserver(
           observerFunction,
           "workspace-bookmarks-updated"
         );
+        Services.obs.removeObserver(
+          onContainerDeleted,
+          "contextual-identity-deleted"
+        );
       });
     }
   }
@@ -173,63 +196,6 @@ class nsZenWorkspaces {
     }
   }
 
-  /**
-   * Applies live sync changes: updates workspace cache, removes deleted items,
-   * then creates/updates pulled items.
-   *
-   * @param {{ spaces: Array}} pulled  Reconcile-pulled items.
-   * @param {{ spaces: Array}} removals  Items to remove.
-   */
-  async _applySyncChanges(pulled, removals = {}) {
-    if (!this.shouldHaveWorkspaces || this.privateWindowOrDisabled) {
-      return;
-    }
-    await this.promiseInitialized;
-
-    // 1. Update workspace cache (remove deleted, merge pulled)
-    const removedSpaceIds = new Set((removals.spaces || []).map(s => s.uuid));
-    if (removedSpaceIds.size || pulled.spaces?.length) {
-      const localMap = new Map(
-        this.getWorkspaces()
-          .filter(w => !removedSpaceIds.has(w.uuid))
-          .map(w => [w.uuid, w])
-      );
-      for (const space of pulled.spaces || []) {
-        if (!space?.uuid) {
-          continue;
-        }
-        const existing = localMap.get(space.uuid);
-        localMap.set(space.uuid, existing ? { ...existing, ...space } : space);
-      }
-      await this.propagateWorkspaces(
-        this.#getOrderedWorkspacesByPosition(Array.from(localMap.values()))
-      );
-      this.#propagateWorkspaceData();
-    }
-  }
-
-  #getOrderedWorkspacesByPosition(workspaces) {
-    return [...workspaces]
-      .map((workspace, index) => ({ workspace, index }))
-      .sort((a, b) => {
-        const aPosition =
-          typeof a.workspace.position === "number"
-            ? a.workspace.position
-            : a.index;
-        const bPosition =
-          typeof b.workspace.position === "number"
-            ? b.workspace.position
-            : b.index;
-        return aPosition - bPosition || a.index - b.index;
-      })
-      .map(({ workspace }) => {
-        // strip the position property that comes from pulled workspaces
-        const rest = { ...workspace };
-        delete rest.position;
-        return rest;
-      });
-  }
-
   #afterLoadInit() {
     const onResize = (...args) => {
       requestAnimationFrame(() => {
@@ -386,10 +352,7 @@ class nsZenWorkspaces {
   }
 
   get shouldAnimateEssentials() {
-    return (
+    return this.containerSpecificEssentials || !!this.creatingWorkspaceId;
-      this.containerSpecificEssentials ||
-      document.documentElement.hasAttribute("zen-creating-workspace")
-    );
   }
 
   get activeWorkspaceElement() {
@@ -499,9 +462,6 @@ class nsZenWorkspaces {
       workspaceWrapper.active = true;
     }
 
-    if (document.documentElement.hasAttribute("zen-creating-workspace")) {
-      workspaceWrapper.hidden = true; // Hide workspace while creating it
-    }
     container.appendChild(workspaceWrapper);
     this.#organizeTabsToWorkspaceSections(workspace, workspaceWrapper, tabs);
     workspaceWrapper.checkPinsExistence();
@@ -862,13 +822,6 @@ class nsZenWorkspaces {
     })();
   }
 
-  #markWorkspaceChanged(workspaceId) {
-    lazy.ZenSyncStore.markItemChanged({
-      type: "space",
-      id: workspaceId,
-    });
-  }
-
   async selectStartPage() {
     if (!this.workspaceEnabled || gZenUIManager.testingEnabled) {
       return;
@@ -959,6 +912,9 @@ class nsZenWorkspaces {
     // Wait for the next event loop to ensure that the startup focus logic by
     // firefox has finished doing it's thing.
     setTimeout(() => {
+      if (document.documentElement.hasAttribute("zen-welcome-stage")) {
+        return;
+      }
       if (gZenVerticalTabsManager._canReplaceNewTab && shownEmptyTab) {
         BrowserCommands.openTab();
       } else if (shownEmptyTab || initialTabWasEmpty) {
@@ -1284,7 +1240,7 @@ class nsZenWorkspaces {
     }
   }
 
-  saveWorkspace(workspaceData) {
+  saveWorkspace(workspaceData, { insertAfterId = null } = {}) {
     if (this.privateWindowOrDisabled) {
       return;
     }
@@ -1292,13 +1248,16 @@ class nsZenWorkspaces {
     const index = workspacesData.findIndex(
       ws => ws.uuid === workspaceData.uuid
     );
+    const insertAfterIndex = insertAfterId
+      ? workspacesData.findIndex(ws => ws.uuid === insertAfterId)
+      : -1;
     if (index !== -1) {
       workspacesData[index] = workspaceData;
+    } else if (insertAfterIndex !== -1) {
+      workspacesData.splice(insertAfterIndex + 1, 0, workspaceData);
     } else {
       workspacesData.push(workspaceData);
     }
-    // mark item as changed for sync
-    this.#markWorkspaceChanged(workspaceData.uuid);
 
     this.#propagateWorkspaceData();
   }
@@ -1307,9 +1266,6 @@ class nsZenWorkspaces {
     let { promise, resolve } = Promise.withResolvers();
     this.#deleteWorkspaceOwnedTabs(windowID);
 
-    // mark item as changed for sync
-    this.#markWorkspaceChanged(windowID);
-
     let workspacesData = this.getWorkspaces();
     // Remove the workspace from the cache
     workspacesData = workspacesData.filter(
@@ -1442,11 +1398,6 @@ class nsZenWorkspaces {
       return;
     }
     const workspaces = this.getWorkspaces();
-    // Track previous positions so we only notify observers for workspaces whose
-    // position changed during the reorder.
-    const previousPositions = new Map(
-      workspaces.map((workspace, index) => [workspace.uuid, index])
-    );
 
     const workspace = workspaces.find(w => w.uuid === id);
     if (!workspace) {
@@ -1475,15 +1426,6 @@ class nsZenWorkspaces {
     // Propagate the changes if the order has changed
     if (currentIndex !== newPosition) {
       this._workspaceCache = workspaces;
-
-      for (const [i, ws] of workspaces.entries()) {
-        if (previousPositions.get(ws.uuid) === i) {
-          continue;
-        }
-        // mark item as changed for sync
-        this.#markWorkspaceChanged(ws.uuid);
-      }
-
       this.#propagateWorkspaceData(workspaces);
     }
   }
@@ -1493,6 +1435,7 @@ class nsZenWorkspaces {
     const previousWorkspace = this.getActiveWorkspace();
     document.documentElement.setAttribute("zen-creating-workspace", "true");
     await this.createAndSaveWorkspace("Space", undefined, false, 0, {
+      insertAfterId: previousWorkspace?.uuid,
       beforeChangeCallback: async workspace => {
         createForm = document.createXULElement("zen-workspace-creation");
         createForm.setAttribute("workspace-id", workspace.uuid);
@@ -1500,7 +1443,18 @@ class nsZenWorkspaces {
           "previous-workspace-id",
           previousWorkspace?.uuid || ""
         );
-        gBrowser.tabContainer.after(createForm);
+        this.creatingWorkspaceId = workspace.uuid;
+        const spaceElement = this.workspaceElement(workspace.uuid);
+        // No essentials sit above the form, so there's no room to reserve for
+        // them. The switch animation needs a value to
+        // animate the padding from.
+        spaceElement.style.paddingTop = "0px";
+        spaceElement.appendChild(createForm);
+        // Keep the strip sitting on the previous space so that the new one,
+        // together with its creation form, slides in like any other space.
+        if (previousWorkspace) {
+          this._organizeWorkspaceStripLocations(previousWorkspace, true);
+        }
         await createForm.promiseInitialized;
       },
     });
@@ -1790,6 +1744,15 @@ class nsZenWorkspaces {
   }
 
   makeSureEmptyTabIsFirst() {
+    if (
+      gZenUIManager.testingEnabled &&
+      this._emptyTab &&
+      (this._emptyTab.closing || !this._emptyTab.isConnected)
+    ) {
+      this._emptyTab = gBrowser.tabs.find(
+        tab => tab.hasAttribute("zen-empty-tab") && !tab.closing
+      );
+    }
     const emptyTab = this._emptyTab;
     if (emptyTab) {
       emptyTab.setAttribute("zen-workspace-id", this.activeWorkspace);
@@ -1861,10 +1824,6 @@ class nsZenWorkspaces {
     justMove = false,
     offsetPixels = 0
   ) {
-    if (document.documentElement.hasAttribute("zen-creating-workspace")) {
-      // If we are creating a workspace, we don't want to animate the strip
-      return;
-    }
     this._organizingWorkspaceStrip = true;
     const workspaces = this.getWorkspaces();
     let workspaceIndex = workspaces.findIndex(w => w.uuid === workspace.uuid);
@@ -1885,6 +1844,7 @@ class nsZenWorkspaces {
     }
     const workspaceContextId = workspace.containerTabId;
     const nextWorkspaceContextId = workspaces[nextSpaceIdx]?.containerTabId;
+    const isCreatingWorkspace = workspace.uuid === this.creatingWorkspaceId;
     for (const otherWorkspace of workspaces) {
       const element = this.workspaceElement(otherWorkspace.uuid);
       let diff = workspaces.indexOf(otherWorkspace) - workspaceIndex;
@@ -1901,8 +1861,9 @@ class nsZenWorkspaces {
       // Get the next workspace contextId, if it's the same, dont apply offsetPixels
       // if it's not we do apply it
       if (
-        container.getAttribute("container") != workspace.containerTabId &&
+        isCreatingWorkspace ||
-        this.shouldAnimateEssentials
+        (container.getAttribute("container") != workspace.containerTabId &&
+          this.shouldAnimateEssentials)
       ) {
         container.setAttribute("hidden", "true");
       } else {
@@ -1977,6 +1938,17 @@ class nsZenWorkspaces {
     delete this._organizingWorkspaceStrip;
   }
 
+  /**
+   * Drop the offset a creation form parked the essentials at.
+   */
+  resetEssentialsPosition() {
+    for (const container of document.querySelectorAll(
+      "#zen-essentials .zen-essentials-container"
+    )) {
+      container.style.removeProperty("transform");
+    }
+  }
+
   updateWorkspaceIndicator(currentWorkspace, workspaceIndicator) {
     if (!workspaceIndicator) {
       return;
@@ -2050,17 +2022,21 @@ class nsZenWorkspaces {
     const isGoingLeft = diff < 0;
     const essentialsAnimData = [];
     if (shouldAnimate && this.shouldAnimateEssentials && previousWorkspace) {
-      const containerIds = new Map();
+      const creatingWorkspaceId = this.creatingWorkspaceId;
+      const essentialsElements = new Map();
       for (const workspace of workspaces) {
-        const containerId = workspace.containerTabId;
+        if (workspace.uuid === creatingWorkspaceId) {
-        if (!containerIds.has(containerId)) {
+          continue;
-          containerIds.set(containerId, []);
         }
-        containerIds.get(containerId).push(workspace);
+        const element = this.getEssentialsSection(workspace.containerTabId);
+        if (!essentialsElements.has(element)) {
+          essentialsElements.set(element, []);
         }
-      for (const [containerId, spaces] of containerIds) {
+        essentialsElements.get(element).push(workspace);
+      }
+      for (const [element, spaces] of essentialsElements) {
         essentialsAnimData.push({
-          element: this.getEssentialsSection(containerId),
+          element,
           workspaces: spaces,
         });
       }
@@ -2201,6 +2177,7 @@ class nsZenWorkspaces {
           existingOffset = currentTransform || (isGoingLeft ? -100 : 100);
           newOffset = 0;
         }
+        data.finalOffset = newOffset;
         const newTransform = `translateX(${newOffset}%)`;
         let existingTransform = `translateX(${existingOffset}%)`;
         if (shouldAnimate) {
@@ -2239,6 +2216,12 @@ class nsZenWorkspaces {
     document.documentElement.removeAttribute("animating-background");
     if (shouldAnimate) {
       for (const data of essentialsAnimData) {
+        if (this.creatingWorkspaceId && data.finalOffset) {
+          // The space being created has no essentials of its own, leave the
+          // ones we just slid away parked off screen instead of snapping them
+          // back under the creation form.
+          continue;
+        }
         data.element.style.removeProperty("transform");
       }
       this._alwaysAnimatePaddingTop = true;
@@ -2585,7 +2568,9 @@ class nsZenWorkspaces {
     icon = undefined,
     dontChange = false,
     containerTabId = 0,
-    { beforeChangeCallback } = { beforeChangeCallback: null } // Callback to run before changing workspace
+    // beforeChangeCallback runs before changing workspace, insertAfterId places
+    // the new space right after an existing one instead of at the end.
+    { beforeChangeCallback = null, insertAfterId = null } = {}
   ) {
     if (!this.workspaceEnabled) {
       return null;
@@ -2606,7 +2591,7 @@ class nsZenWorkspaces {
       this.#createWorkspaceTabsSection(workspaceData, extraTabs);
       this._organizeWorkspaceStripLocations(workspaceData);
     }
-    this.saveWorkspace(workspaceData);
+    this.saveWorkspace(workspaceData, { insertAfterId });
     if (!dontChange) {
       if (beforeChangeCallback) {
         try {
@@ -2728,6 +2713,11 @@ class nsZenWorkspaces {
         workspacesIds.push(originalWorkspaceId);
       }
       for (const workspaceId of workspacesIds) {
+        if (workspaceId === this.creatingWorkspaceId) {
+          // The space being created shows the creation form instead of its
+          // essentials, so it doesn't reserve any room for them.
+          continue;
+        }
         const workspaceElement = this.workspaceElement(workspaceId);
         const workspaceObject = this.getWorkspaceFromId(workspaceId);
         if (!workspaceElement || !workspaceObject) {
@@ -3320,8 +3310,10 @@ class nsZenWorkspaces {
       return width;
     }, 0);
 
-    // Check if the total width exceeds the parent's width
+    // Check if the total width exceeds the parent's width.
-    if (totalWidth > parent.clientWidth) {
+    const parentWidth =
+      window.windowUtils.getBoundsWithoutFlushing(parent).width;
+    if (totalWidth > parentWidth) {
       parent.setAttribute("icons-overflow", "true");
     } else {
       parent.removeAttribute("icons-overflow");
@@ -3329,7 +3321,7 @@ class nsZenWorkspaces {
 
     // Set the width of each icon to the maximum size they can fit on
     const widthPerButton = Math.max(
-      (parent.clientWidth - separation * (parent.children.length - 1)) /
+      (parentWidth - separation * (parent.children.length - 1)) /
         parent.children.length,
       minButtonSize
     );

src/zen/spaces/create-workspace-form.css

@@ -6,9 +6,10 @@
 
 zen-workspace-creation {
   flex: 1;
-  max-width: calc(var(--zen-sidebar-width) - var(--zen-toolbox-padding));
+  flex-direction: column;
-  padding: 3px;
+  min-height: 0;
-  visibility: collapse;
+  width: 100%;
+  padding: 3px var(--zen-toolbox-padding);
 
   & .zen-workspace-creation {
     justify-content: center;
@@ -51,7 +52,7 @@ zen-workspace-creation {
 
       & .zen-workspace-creation-name-wrapper {
         padding: 9px 6px;
-        border-radius: 8px !important;
+        border-radius: calc(8px * var(--zen-squircle-value)) !important;
         margin: 0;
         background-color: var(--input-text-background-color);
         gap: 8px;
@@ -95,7 +96,7 @@ zen-workspace-creation {
 
           &::before {
             border: 1px dashed light-dark(rgba(0, 0, 0, 0.5), rgba(255, 255, 255, 0.5));
-            border-radius: 4px;
+            border-radius: 6px;
             width: calc(100% + 2px);
             height: calc(100% + 2px);
             content: "";
@@ -118,7 +119,7 @@ zen-workspace-creation {
 
       & .zen-workspace-creation-profile-wrapper {
         padding: 4px;
-        border-radius: 8px !important;
+        border-radius: calc(8px * var(--zen-squircle-value)) !important;
         margin: 0;
         background-color: var(--input-text-background-color);
         gap: 4px;
@@ -147,7 +148,7 @@ zen-workspace-creation {
       }
 
       & .zen-workspace-creation-edit-theme-button {
-        border-radius: 8px !important;
+        border-radius: calc(8px * var(--zen-squircle-value)) !important;
         margin: 0;
         background-color: var(--input-text-background-color);
         justify-content: center;