Revert "gh-15144: Update windows registry on update" (gh-15153)

Closes https://github.com/zen-browser/desktop/issues/15134

Fix video:

https://github.com/user-attachments/assets/1c06ea7f-d482-4d4a-8bbe-df41daa27616

.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

@@ -287,7 +287,7 @@ jobs:
     with:
       use-sccache: ${{ inputs.use-sccache }}
       build-version: ${{ needs.build-data.outputs.version }}
-      generate-gpo: true
+      generate-pgo: true
       profile-data-path-archive: zen-windows-profile-data-and-jarlog.zip
       release-branch: ${{ inputs.update_branch }}
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
@@ -313,7 +313,7 @@ jobs:
     needs: [build-data, windows-step-2, start-self-host, buildid]
     with:
       build-version: ${{ needs.build-data.outputs.version }}
-      generate-gpo: false
+      generate-pgo: false
       release-branch: ${{ inputs.update_branch }}
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
       use-sccache: ${{ inputs.use-sccache }}
@@ -331,15 +331,41 @@ jobs:
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
       use-sccache: ${{ inputs.use-sccache }}
 
-  mac:
-    name: macOS build
+  mac-step-1:
+    name: macOS build step 1 (PGO build)
+    uses: ./.github/workflows/macos-release-build.yml
+    needs: [build-data, buildid]
+    permissions:
+      contents: write
+    secrets: inherit
+    with:
+      use-sccache: ${{ inputs.use-sccache }}
+      build-version: ${{ needs.build-data.outputs.version }}
+      generate-pgo: true
+      release-branch: ${{ inputs.update_branch }}
+      MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
+
+  mac-step-2:
+    name: macOS build step 2 (Generate profile data)
+    uses: ./.github/workflows/macos-profile-build.yml
+    permissions:
+      contents: write
+    secrets: inherit
+    needs: [mac-step-1, build-data]
+    with:
+      build-version: ${{ needs.build-data.outputs.version }}
+      release-branch: ${{ inputs.update_branch }}
+
+  mac-step-3:
+    name: macOS build step 3 (build with profile data)
     uses: ./.github/workflows/macos-release-build.yml
     permissions:
       contents: write
     secrets: inherit
-    needs: [build-data, buildid]
+    needs: [build-data, mac-step-2, start-self-host, buildid]
     with:
       build-version: ${{ needs.build-data.outputs.version }}
+      generate-pgo: false
       release-branch: ${{ inputs.update_branch }}
       MOZ_BUILD_DATE: ${{needs.buildid.outputs.buildids}}
       use-sccache: ${{ inputs.use-sccache }}
@@ -350,7 +376,7 @@ jobs:
     permissions:
       contents: write
     secrets: inherit
-    needs: [build-data, mac]
+    needs: [build-data, mac-step-3]
     with:
       build-version: ${{ needs.build-data.outputs.version }}
       release-branch: ${{ inputs.update_branch }}

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

@@ -105,6 +105,8 @@ 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

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

@@ -0,0 +1,111 @@
+name: macOS PGO Builds
+
+permissions:
+  contents: read
+
+on:
+  workflow_call:
+    inputs:
+      build-version:
+        description: "The version to build"
+        required: true
+        type: string
+      release-branch:
+        description: "The branch to build"
+        required: true
+        type: string
+
+jobs:
+  macos-profile-build:
+    name: |
+      macOS Profile Build - ${{ matrix.arch }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, aarch64]
+
+    runs-on: ${{ matrix.arch == 'x86_64' && 'macos-15-intel' || 'macos-26' }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: ".nvmrc"
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+
+      - name: Setup Git
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Setup Rust
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $(cat .rust-toolchain)
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Load Surfer CI setup
+        run: npm run surfer -- ci --brand ${{ inputs.release-branch }} --display-version ${{ inputs.build-version }}
+
+      - name: Download instrumented app
+        uses: actions/download-artifact@v4
+        with:
+          path: ~/instrumented
+          name: macos-pgo-stage1-${{ matrix.arch }}
+
+      - name: Download Firefox and dependencies
+        run: npm run download
+
+      - name: Import patches
+        env:
+          SURFER_NO_BRANDING_PATCH: true
+        run: |
+          . "$HOME/.cargo/env"
+          npm run import
+
+      - name: Bootstrap
+        run: |
+          cd engine
+          export SURFER_PLATFORM="darwin"
+          ./mach --no-interactive bootstrap --application-choice browser --exclude macos-sdk || true
+
+      - name: Extract instrumented app
+        run: |
+          set -ex
+          cd engine
+          ./mach python -m mozbuild.action.unpack_dmg \
+            "$HOME/instrumented/zen-macos-pgo-stage1-${{ matrix.arch }}.dmg" \
+            "$HOME/instrumented/app"
+          APP=$(find "$HOME/instrumented/app" -maxdepth 1 -name "*.app" -type d | head -1)
+          codesign --force --deep --sign - "$APP" || true
+
+      - name: Generate profile data
+        run: |
+          set -ex
+          export LLVM_PROFDATA="$HOME/.mozbuild/clang/bin/llvm-profdata"
+          export JARLOG_FILE=en-US.log
+          BINARY=$(find "$HOME/instrumented" -type f -path "*/Contents/MacOS/zen" | head -1)
+          test -n "$BINARY"
+          cd engine
+          ./mach python ../scripts/download_pgo_extended_corpus.py
+          ./mach python build/pgo/profileserver.py --binary "$BINARY" --extended-corpus ./pgo-extended-corpus
+
+      - name: Move profile data
+        run: |
+          mv engine/merged.profdata merged.profdata
+          mv engine/en-US.log en-US.log
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          retention-days: 1
+          path: |
+            merged.profdata
+            en-US.log
+          name: macos-profdata-${{ matrix.arch }}

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

@@ -1,10 +1,15 @@
 name: macOS Release Build
+
 permissions:
   contents: read
 
 on:
   workflow_call:
     inputs:
+      generate-pgo:
+        required: true
+        type: boolean
+        default: false
       build-version:
         description: "The version to build"
         required: true
@@ -26,17 +31,22 @@ on:
 jobs:
   mac-build:
     name: Build macOS - ${{ matrix.arch }}
-    runs-on: ${{ (inputs.release-branch == 'release') && 'blacksmith-6vcpu-macos-latest' || 'macos-26' }}
-
-    strategy:
-      fail-fast: false
-      matrix:
-        arch: [x86_64, aarch64]
+    runs-on: 'blacksmith-8vcpu-ubuntu-2404'
     env:
       SCCACHE_GHA_ENABLED: ${{ inputs.use-sccache && 'true' || 'false' }}
       CARGO_TERM_COLOR: always
       CARGO_INCREMENTAL: 0
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, aarch64]
+
     steps:
+      - name: Free Disk Space (Ubuntu)
+        uses: jlumbroso/free-disk-space@main
+        with:
+          tool-cache: false
+
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
@@ -44,16 +54,10 @@ jobs:
           token: ${{ secrets.DEPLOY_KEY }}
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: useblacksmith/setup-node@v5
         with:
           node-version-file: ".nvmrc"
 
-      - name: Log SDK versions
-        run: |
-          ls /Library/Developer/CommandLineTools/SDKs/
-          xcrun --show-sdk-version
-          xcrun --show-sdk-path
-
       - name: Run sccache-cache
         uses: mozilla-actions/sccache-action@main
         if: ${{ inputs.use-sccache }}
@@ -67,157 +71,158 @@ jobs:
             core.exportVariable('ACTIONS_CACHE_URL', process.env['ACTIONS_CACHE_URL'])
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env['ACTIONS_RUNTIME_TOKEN'])
 
-      - name: Setup Python
-        uses: actions/setup-python@v5
-        # note: This will use the version defined in '.python-version' by default
-
       - name: Setup Git
         run: |
           git config --global user.name "github-actions[bot]"
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
 
-      - name: Install system dependencies
+      - name: Install dependencies
         run: |
-          brew update
-          brew install cairo gnu-tar mercurial
-          sudo pip install setuptools
+          npm ci
+          sudo apt-get update
+          sudo apt-get install -y python3 python3-pip zstd yasm nasm build-essential libgtk2.0-dev libpython3-dev m4 uuid libasound2-dev libcurl4-openssl-dev libdbus-1-dev libdrm-dev libdbus-glib-1-dev libgtk-3-dev libpulse-dev libx11-xcb-dev libxt-dev xvfb --fix-missing
 
-          brew uninstall --ignore-dependencies python3.12 -f
+      - name: Load Surfer CI setup
+        run: npm run surfer -- ci --brand ${{ inputs.release-branch }} --display-version ${{ inputs.build-version }}
 
-          export PATH="$(python3 -m site --user-base)/bin":$PATH
-          python3 -m pip install --user mercurial
+      - name: Download Firefox and dependencies
+        run: npm run download
 
-          rm '/usr/local/bin/2to3-3.11' '/usr/local/bin/2to3-3.12' '/usr/local/bin/2to3'
-          rm '/usr/local/bin/idle3.11' '/usr/local/bin/idle3.12' '/usr/local/bin/idle3'
-          rm '/usr/local/bin/pydoc3.11' '/usr/local/bin/pydoc3.12' '/usr/local/bin/pydoc3'
-          rm '/usr/local/bin/python3.11' '/usr/local/bin/python3.12' '/usr/local/bin/python3'
-          rm '/usr/local/bin/python3.11-config' '/usr/local/bin/python3.12-config' '/usr/local/bin/python3-config'
+      - name: mac-cross Cache
+        env:
+          SEGMENT_DOWNLOAD_TIMEOUT_MINS: 5
+        id: cache-mac-cross
+        uses: useblacksmith/cache@v5
+        with:
+          path: ${HOME}/mac-cross
+          key: mac-cross
 
-          brew install watchman
+      - name: Setup for macOS (cctools and DMG tools)
+        if: steps.cache-mac-cross.outputs.cache-hit != 'true'
+        run: |
+          set -ex
+          mkdir -p ~/mac-cross
+          cd engine/
+          ./mach artifact toolchain --from-build linux64-cctools-port linux64-libdmg linux64-hfsplus
+          mv cctools dmg hfsplus ~/mac-cross/
+          ls ~/mac-cross/cctools/bin/x86_64-apple-darwin-ld ~/mac-cross/cctools/bin/aarch64-apple-darwin-ld ~/mac-cross/dmg/dmg ~/mac-cross/hfsplus/newfs_hfs
 
+      - name: Setup Rust
+        run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $(cat .rust-toolchain)
           source $HOME/.cargo/env
-
           if test "${{ matrix.arch }}" = "aarch64"; then
             rustup target add aarch64-apple-darwin
           else
             rustup target add x86_64-apple-darwin
           fi
 
-      - name: Force usage of gnu-tar
-        run: |
-          echo 'export PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH"' >> ~/.bash_profile
-          echo 'export PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH"' >> ~/.zsh
-          source ~/.bash_profile
-
-      - name: Install dependencies
-        run: |
-          npm ci
-
-      - name: Load surfer CI setup
-        run: npm run surfer -- ci --brand ${{ inputs.release-branch }} --display-version ${{ inputs.build-version }}
-
-      - name: Download Firefox source and dependencies
-        run: npm run download
-
       - name: Import
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           SURFER_CERT_PATCH_ISSUER: ${{ secrets.SURFER_CERT_PATCH_ISSUER }}
           SURFER_CERT_PATCH_NAME: ${{ secrets.SURFER_CERT_PATCH_NAME }}
-        run: npm run import
+          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"
+          npm run import -- --verbose
 
       - name: Bootstrap
         run: |
-          cd engine
+          set -x
           export SURFER_PLATFORM="darwin"
-          export PATH="$(python3 -m site --user-base)/bin":$PATH
-          # Always exist with 0, even if bootstrap fails
-          ./mach --no-interactive bootstrap --application-choice browser --exclude macos-sdk || true
-          cd ..
+          npm run bootstrap
 
       - name: Build language packs
         run: sh scripts/download-language-packs.sh
 
-      - name: Build Zen (PGO stage 1 - generate)
+      - name: Download artifact (if use profdata)
+        uses: actions/download-artifact@v4
+        if: ${{ !inputs.generate-pgo }}
+        with:
+          path: ~/artifact
+          name: macos-profdata-${{ matrix.arch }}
+
+      - name: Show artifact info
+        if: ${{ !inputs.generate-pgo }}
+        run: |
+          ls ~/artifact
+          ls ~/artifact/en-US.log
+          ls ~/artifact/merged.profdata
+
+      - name: Build
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           ZEN_RELEASE_BRANCH: ${{ inputs.release-branch }}
-          ZEN_GA_GENERATE_PROFILE: 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 }}
-        run: |
-          export SURFER_PLATFORM="darwin"
-          if [[ -n ${{ inputs.MOZ_BUILD_DATE }} ]];then
-            export MOZ_BUILD_DATE=${{ inputs.MOZ_BUILD_DATE }}
-          fi
-          bash .github/workflows/src/release-build.sh
-
-      - name: Generate PGO profile data
-        env:
-          SURFER_COMPAT: ${{ matrix.arch }}
         run: |
           set -x
-          export LLVM_PROFDATA="$HOME/.mozbuild/clang/bin/llvm-profdata"
-          export JARLOG_FILE=en-US.log
-          mkdir -p "$HOME/artifact"
-          cd engine
-          ./mach python ../scripts/download_pgo_extended_corpus.py
-          ./mach package
-          ./mach python build/pgo/profileserver.py --extended-corpus ./pgo-extended-corpus
-          mv merged.profdata "$HOME/artifact/merged.profdata"
-          mv en-US.log "$HOME/artifact/en-US.log"
-
-      - name: Build Zen
-        env:
-          SURFER_COMPAT: ${{ matrix.arch }}
-          ZEN_RELEASE_BRANCH: ${{ inputs.release-branch }}
-          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 }}
-        run: |
           export SURFER_PLATFORM="darwin"
+          export ZEN_CROSS_COMPILING=1
+          if test ${{ inputs.generate-pgo }} = true; then
+            export ZEN_GA_GENERATE_PROFILE=1
+          fi
           if [[ -n ${{ inputs.MOZ_BUILD_DATE }} ]];then
             export MOZ_BUILD_DATE=${{ inputs.MOZ_BUILD_DATE }}
           fi
           bash .github/workflows/src/release-build.sh
 
+      - name: Package instrumented app (PGO stage 1)
+        if: ${{ inputs.generate-pgo }}
+        env:
+          SURFER_COMPAT: ${{ matrix.arch }}
+          ZEN_RELEASE: 1
+          SURFER_PLATFORM: darwin
+          ZEN_CROSS_COMPILING: 1
+          ZEN_GA_GENERATE_PROFILE: 1
+        run: |
+          set -ex
+          cd engine
+          ./mach package
+          mv obj-${{ matrix.arch }}-apple-darwin/dist/*.dmg "$GITHUB_WORKSPACE/zen-macos-pgo-stage1-${{ matrix.arch }}.dmg"
+
+      - name: Upload artifact (PGO stage 1)
+        uses: actions/upload-artifact@v4
+        if: ${{ inputs.generate-pgo }}
+        with:
+          retention-days: 2
+          name: macos-pgo-stage1-${{ matrix.arch }}
+          path: ./zen-macos-pgo-stage1-${{ matrix.arch }}.dmg
+
       - name: Package
+        if: ${{ !inputs.generate-pgo }}
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           ZEN_GA_DISABLE_PGO: true
         run: |
+          set -x
           export SURFER_PLATFORM="darwin"
+          export ZEN_CROSS_COMPILING=1
           export ZEN_RELEASE=1
           npm run package
 
       - name: Rename artifacts
+        if: ${{ !inputs.generate-pgo }}
         run: |
-          echo "Tarballing DMG"
           set -ex
           mv ./dist/*.dmg ./zen-${{ matrix.arch }}-apple-darwin-dist.dmg
-          mv ./engine/obj-${{ matrix.arch }}-apple-darwin/dist/host/bin/mar ./zen-macos-host-mar
           mv ./engine/obj-${{ matrix.arch }}-apple-darwin/dist/bin/platform.ini ./platform.ini
 
       - name: Upload dist dmg
         uses: actions/upload-artifact@v4
+        if: ${{ !inputs.generate-pgo }}
         with:
           retention-days: 1
           name: zen-${{ matrix.arch }}-apple-darwin-dist.dmg
           path: ./zen-${{ matrix.arch }}-apple-darwin-dist.dmg
 
-      - name: Upload host mar
-        uses: actions/upload-artifact@v4
-        if: matrix.arch == 'aarch64'
-        with:
-          retention-days: 1
-          name: zen-macos-host-mar
-          path: ./zen-macos-host-mar
-
       - name: Upload platform.ini
         uses: actions/upload-artifact@v4
-        if: matrix.arch == 'x86_64'
+        if: ${{ !inputs.generate-pgo && matrix.arch == 'x86_64' }}
         with:
           retention-days: 1
           name: platform.ini

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

@@ -99,6 +99,16 @@ jobs:
           cd engine
           ./mach configure
 
+      - name: Build host mar tool
+        run: |
+          set -ex
+          cd engine
+          echo "ac_add_options --enable-project=tools/update-packaging" > mar-mozconfig
+          echo "mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/obj-mar-tools" >> mar-mozconfig
+          MOZCONFIG=$PWD/mar-mozconfig ./mach build -v
+          cp obj-mar-tools/dist/host/bin/mar ../zen-macos-host-mar
+          rm -rf obj-mar-tools mar-mozconfig
+
       - name: Download x86_64 DMG from artifacts
         uses: actions/download-artifact@v4
         with:
@@ -213,11 +223,6 @@ jobs:
             --wait
           xcrun stapler staple "zen.macos-universal.dmg"
 
-      - name: Download host mar
-        uses: actions/download-artifact@v4
-        with:
-          name: zen-macos-host-mar
-
       - name: Upload build artifact
         uses: actions/upload-artifact@v4
         with:

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

@@ -6,7 +6,7 @@ permissions:
 on:
   workflow_call:
     inputs:
-      generate-gpo:
+      generate-pgo:
         required: true
         type: boolean
         default: false
@@ -35,7 +35,7 @@ jobs:
   windows-build:
     name: Build Windows - ${{ matrix.arch }}
     # aarch64 does not need full 16x, and we also dont use full LTO when generating GPO
-    runs-on: ${{ (inputs.release-branch == 'release' && !inputs.generate-gpo && matrix.arch == 'x86_64') && 'self-hosted' || 'blacksmith-8vcpu-ubuntu-2404' }}
+    runs-on: ${{ (inputs.release-branch == 'release' && !inputs.generate-pgo && matrix.arch == 'x86_64') && 'self-hosted' || 'blacksmith-8vcpu-ubuntu-2404' }}
     env:
       SCCACHE_GHA_ENABLED: ${{ inputs.use-sccache && 'true' || 'false' }}
       CARGO_TERM_COLOR: always
@@ -48,7 +48,7 @@ jobs:
     steps:
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         with:
           tool-cache: false
 
@@ -91,7 +91,7 @@ jobs:
         run: npm run surfer -- ci --brand ${{ inputs.release-branch }} --display-version ${{ inputs.build-version }}
 
       - name: Download Firefox and dependencies
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         run: npm run download
 
       - name: win-cross Cache
@@ -104,7 +104,7 @@ jobs:
           key: win-cross
 
       - name: Setup for Windows
-        if: steps.cache-win-cross.outputs.cache-hit != 'true' && !(inputs.generate-gpo && matrix.arch == 'aarch64')
+        if: steps.cache-win-cross.outputs.cache-hit != 'true' && !(inputs.generate-pgo && matrix.arch == 'aarch64')
         run: |
           set -x
           mkdir -p ~/win-cross
@@ -154,24 +154,26 @@ jobs:
             zlib1g-dev \
             aria2
           echo Setup wine
-          aria2c "https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/dQz_aHy8Rl-Lt0xf2WlrMw/artifacts/public/build/wine.tar.zst" -o wine.tar.zst
+          aria2c "https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-wine.latest/artifacts/public/build/wine.tar.zst" -o wine.tar.zst
           tar --zstd -xf wine.tar.zst -C ~/win-cross
           rm wine.tar.zst
           echo Setup Visual Studio
           ./mach python --virtualenv build taskcluster/scripts/misc/get_vs.py build/vs/vs2026.yaml ~/win-cross/vs2026
 
       - name: Import
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         env:
           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
 
       - name: Bootstrap
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         run: |
           set -x
           cd engine/
@@ -189,7 +191,7 @@ jobs:
           ls ~/win-cross/vs2026 || true
 
       - name: Setup Rust
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $(cat .rust-toolchain)
           source $HOME/.cargo/env
@@ -208,18 +210,18 @@ jobs:
           echo "export MOZ_WINDOWS_RS_DIR=$(pwd)/windows-$WINDOWS_RS_VERSION" >> ../configs/common/mozconfig
 
       - name: Build language packs
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         run: sh scripts/download-language-packs.sh
 
       - name: Download artifact (if use profdata)
         uses: actions/download-artifact@v4
-        if: ${{ !inputs.generate-gpo && matrix.arch == 'x86_64' }}
+        if: ${{ !inputs.generate-pgo && matrix.arch == 'x86_64' }}
         with:
           path: ~/artifact
           name: windows-profdata-${{ matrix.arch == 'aarch64' && 'arm64' || matrix.arch }}
 
       - name: Show artifact info
-        if: ${{ !inputs.generate-gpo && matrix.arch == 'x86_64' }}
+        if: ${{ !inputs.generate-pgo && matrix.arch == 'x86_64' }}
         run: |
           ls ~/artifact
           ls ~/artifact/en-US.log
@@ -228,7 +230,7 @@ jobs:
           chmod +x ~/artifact/merged.profdata
 
       - name: Build
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           ZEN_RELEASE_BRANCH: ${{ inputs.release-branch }}
@@ -241,7 +243,7 @@ jobs:
           dos2unix configs/windows/mozconfig
           export SURFER_PLATFORM="win32"
           export ZEN_CROSS_COMPILING=1
-          if test ${{ inputs.generate-gpo }} = true; then
+          if test ${{ inputs.generate-pgo }} = true; then
             export ZEN_GA_GENERATE_PROFILE=1
           fi
           if [[ -n ${{ inputs.MOZ_BUILD_DATE }} ]];then
@@ -250,7 +252,7 @@ jobs:
           bash .github/workflows/src/release-build.sh
 
       - name: Package
-        if: ${{ !(inputs.generate-gpo && matrix.arch == 'aarch64') }}
+        if: ${{ !(inputs.generate-pgo && matrix.arch == 'aarch64') }}
         env:
           SURFER_COMPAT: ${{ matrix.arch }}
           ZEN_GA_DISABLE_PGO: true
@@ -265,13 +267,13 @@ jobs:
           ls .
 
       - name: Move package for PGO upload
-        if: ${{ inputs.generate-gpo && matrix.arch == 'x86_64' }}
+        if: ${{ inputs.generate-pgo && matrix.arch == 'x86_64' }}
         run: |
           set -x
           mv ./zen.win64.zip ./zen.win64-pgo-stage-1.zip
 
       - name: Rename artifacts
-        if: ${{ !inputs.generate-gpo }}
+        if: ${{ !inputs.generate-pgo }}
         run: |
           mv ./zen.win64.zip zen.win-${{ matrix.arch == 'aarch64' && 'arm64' || matrix.arch }}.zip
           mv ./dist/output.mar windows${{ matrix.arch == 'aarch64' && '-arm64' || '' }}.mar
@@ -279,14 +281,14 @@ jobs:
 
       - name: Upload artifact (PGO)
         uses: actions/upload-artifact@v4
-        if: ${{ inputs.generate-gpo && matrix.arch == 'x86_64' }}
+        if: ${{ inputs.generate-pgo && matrix.arch == 'x86_64' }}
         with:
           retention-days: 2
           name: ${{ matrix.arch == 'aarch64' && 'arm64' || matrix.arch }}-${{ inputs.profile-data-path-archive }}
           path: ./zen.win64-pgo-stage-1.zip
 
       - name: Remove unnecessary files from obj
-        if: ${{ !inputs.generate-gpo }}
+        if: ${{ !inputs.generate-pgo }}
         run: |
           set -x
           mkdir obj-${{ matrix.arch }}-pc-windows-msvc/
@@ -301,7 +303,7 @@ jobs:
           cp -r --no-dereference engine/obj-${{ matrix.arch }}-pc-windows-msvc/* obj-${{ matrix.arch }}-pc-windows-msvc/ || true
 
       - name: Upload dist object
-        if: ${{ !inputs.generate-gpo }}
+        if: ${{ !inputs.generate-pgo }}
         uses: actions/upload-artifact@v4
         with:
           retention-days: 2
@@ -309,7 +311,7 @@ jobs:
           path: obj-${{ matrix.arch }}-pc-windows-msvc
 
       - name: Upload artifact (if Twilight branch, installer)
-        if: ${{ inputs.release-branch == 'twilight' && !inputs.generate-gpo }}
+        if: ${{ inputs.release-branch == 'twilight' && !inputs.generate-pgo }}
         uses: actions/upload-artifact@v4
         with:
           retention-days: 5
@@ -317,7 +319,7 @@ jobs:
           path: ./zen.installer${{ matrix.arch == 'aarch64' && '-arm64' || '' }}.exe
 
       - name: Upload artifact (if Twilight branch, .mar)
-        if: ${{ inputs.release-branch == 'twilight' && !inputs.generate-gpo }}
+        if: ${{ inputs.release-branch == 'twilight' && !inputs.generate-pgo }}
         uses: actions/upload-artifact@v4
         with:
           retention-days: 5
@@ -325,7 +327,7 @@ jobs:
           path: ./windows${{ matrix.arch == 'aarch64' && '-arm64' || '' }}.mar
 
       - name: Upload artifact (if Twilight branch, update manifests)
-        if: ${{ inputs.release-branch == 'twilight' && !inputs.generate-gpo }}
+        if: ${{ inputs.release-branch == 'twilight' && !inputs.generate-pgo }}
         uses: actions/upload-artifact@v4
         with:
           retention-days: 5

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 `153.0.3`! 🚀
-- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 153.0.3`!
+- [`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 154.0.1`!
 
 ### Contributing
 

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

@@ -1 +1 @@
-8a0a534248f80d8c53a8997f24683521c3a50ebc
+bf4b57fd7fe94054457be7018e8e7beaf754c520

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
 )
 
@@ -24,12 +22,23 @@ 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=""
 
+# Fetch SignIdentity from the github repo secrets, with the name SURFER_CERT_PATCH_ISSUER
+$SignIdentityIssuer = (Invoke-RestMethod -Uri "https://api.github.com/repos/zen-browser/desktop/actions/secrets/SURFER_CERT_PATCH_ISSUER" -Headers @{Authorization = "Bearer $token"}).value
+$SignIdentity = (Invoke-RestMethod -Uri "https://api.github.com/repos/zen-browser/desktop/actions/secrets/SURFER_CERT_PATCH_NAME" -Headers @{Authorization = "Bearer $token"}).value
+$SignIndentityIssuerPrev = (Invoke-RestMethod -Uri "https://api.github.com/repos/zen-browser/desktop/actions/secrets/SURFER_CERT_PATCH_ISSUER_PREV" -Headers @{Authorization = "Bearer $token"}).value
+$SignIdentityPrev = (Invoke-RestMethod -Uri "https://api.github.com/repos/zen-browser/desktop/actions/secrets/SURFER_CERT_PATCH_NAME_PREV" -Headers @{Authorization = "Bearer $token"}).
+
 $env:SURFER_CERT_PATCH_ISSUER=$SignIdentityIssuer
 $env:SURFER_CERT_PATCH_NAME=$SignIdentity
 
+$env:SURFER_CERT_PATCH_NAME_PREV=$SignIdentityPrev
+$env:SURFER_CERT_PATCH_ISSUER_PREV=$SignIndentityIssuerPrev
+
 Start-Job -Name "DownloadGitl10n" -ScriptBlock {
     param($PWD)
     cd $PWD
@@ -46,7 +55,6 @@ 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
@@ -215,20 +223,12 @@ SignAndPackage x86_64
 $files = Get-ChildItem .\windsign-temp\windows-x64-signed-x86_64, .\windsign-temp\windows-x64-signed-arm64 -Recurse -Include *.exe
 signtool.exe sign /n "$SignIdentity" /t http://time.certum.pl/ /fd sha256 /v $files
 
-# Compress each signed bundle into a single gzip tarball (`-C <dir> .` so it has
-# no top-level directory) and upload it as a release asset on the windows-binaries
-# repo, keyed to this build's run id. Release assets keep the bundles out of git
-# (they were too large to commit) while still living in the windows-binaries repo.
-# The gated release job downloads and expands these from that repo's releases.
 $binariesRepo = "zen-browser/windows-binaries"
 $stagingTag = "windows-signed-$GithubRunId"
 echo "Ensuring staging release $stagingTag exists on $binariesRepo"
-gh release view $stagingTag --repo $binariesRepo *> $null
+gh release create $stagingTag --repo $binariesRepo --prerelease --title "Windows signed bundles ($GithubRunId)" --notes "Signed Windows bundles for run $GithubRunId, consumed by the release workflow. Safe to delete."
 if ($LASTEXITCODE -ne 0) {
-    gh release create $stagingTag --repo $binariesRepo --prerelease --title "Windows signed bundles ($GithubRunId)" --notes "Signed Windows bundles for run $GithubRunId, consumed by the release workflow. Safe to delete."
-    if ($LASTEXITCODE -ne 0) {
-        throw "Failed to create staging release $stagingTag on $binariesRepo"
-    }
+    throw "Failed to create staging release $stagingTag on $binariesRepo"
 }
 
 foreach ($name in @("x86_64", "arm64")) {

configs/common/mozconfig

@@ -91,11 +91,6 @@ if test "$ZEN_RELEASE"; then
   export MOZ_PACKAGE_JSSHELL=1
 
   ac_add_options --disable-crashreporter
-
-  # Experimental flag, enabled only on nightly for Firefox.
-  # Should bring in some nice performance improvements, 
-  # but may cause stability issues.
-  ac_add_options --enable-replace-malloc
 fi
 
 ac_add_options --enable-jxl

configs/macos/mozconfig

@@ -7,7 +7,21 @@ unset MOZ_STDCXX_COMPAT
 ac_add_options --disable-dmd
 ac_add_options --enable-eme=widevine
 
-if test "$ZEN_RELEASE"; then
+if test "$ZEN_CROSS_COMPILING"; then
+  ZEN_MAC_CROSS="$HOME/mac-cross"
+
+  mk_add_options "export PATH=$ZEN_MAC_CROSS/cctools/bin:$PATH"
+  mk_add_options "export LD_LIBRARY_PATH=$HOME/.mozbuild/clang/lib:$LD_LIBRARY_PATH"
+
+  export MKFSHFS=$ZEN_MAC_CROSS/hfsplus/newfs_hfs
+  export DMG_TOOL=$ZEN_MAC_CROSS/dmg/dmg
+  export HFS_TOOL=$ZEN_MAC_CROSS/dmg/hfsplus
+
+  if test "$ZEN_RELEASE"; then
+    export MOZ_LD64_KNOWN_GOOD=1
+    ac_add_options --enable-linker=ld64
+  fi
+elif test "$ZEN_RELEASE"; then
   ALLOWED_SDKS="26.5 26.4"
   for SDK in $ALLOWED_SDKS; do
     if [ -d "/Library/Developer/CommandLineTools/SDKs/MacOSX${SDK}.sdk" ]; then
@@ -52,13 +66,3 @@ else
     export CXXFLAGS="$CXXFLAGS -mcpu=apple-m1"
   fi
 fi
-
-# Keep using ld64 on PGO/LTO builds because of performance regressions when using lld.
-# Mozilla sets "MOZ_LD64_KNOWN_GOOD" to true when they do automated builds with PGO/LTO on macOS.
-# See https://searchfox.org/firefox-main/rev/e61d59b5c9a651fd7bf28043f87c0dc669833496/build/moz.configure/lto-pgo.configure#261
-# export MOZ_LD64_KNOWN_GOOD=1
-# ac_add_options --enable-linker=ld64
-# 
-# if test "$ZEN_RELEASE"; then
-#   mk_add_options MOZ_MAKE_FLAGS="-j4"
-# fi

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

@@ -48,6 +48,11 @@ zen-look-and-feel-compact-view-top-toolbar =
 zen-look-and-feel-compact-toolbar-flash-popup =
     .label = Briefly make the toolbar popup when switching or opening new tabs in compact mode
 
+zen-look-and-feel-window-drag-header = Window dragging
+zen-look-and-feel-window-drag-description = Move the window by dragging empty space at the top of websites, just like the titlebar.
+zen-window-drag-enabled =
+    .label = Allow dragging the window from web pages
+
 pane-zen-tabs-title = Tab Management
 category-zen-workspaces =
     .tooltiptext = { pane-zen-tabs-title }

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] Add split view...
+            [-1] Split Out Tab
+            [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

package-lock.json

@@ -11,7 +11,7 @@
       "devDependencies": {
         "@babel/preset-typescript": "^7.27.0",
         "@zen-browser/prettier": "^3.9.3",
-        "@zen-browser/surfer": "^1.14.6",
+        "@zen-browser/surfer": "^1.14.8",
         "formal-git": "^1.2.9",
         "globals": "^16.3.0",
         "husky": "^9.1.7",
@@ -860,9 +860,9 @@
       }
     },
     "node_modules/@zen-browser/surfer": {
-      "version": "1.14.6",
-      "resolved": "https://registry.npmjs.org/@zen-browser/surfer/-/surfer-1.14.6.tgz",
-      "integrity": "sha512-hgTKadIJ/9/9dizHn4229ZZHQckd7D4OR6e7HVkcmtuq1Jke3OAn6SH7u7NjvzvYy35Mb2sXjVUvZEG1ITIfgg==",
+      "version": "1.14.8",
+      "resolved": "https://registry.npmjs.org/@zen-browser/surfer/-/surfer-1.14.8.tgz",
+      "integrity": "sha512-5HHcfibwHIK5n3huhJL2TLBX2+8odj6ebCMA6U2EcUj9ROSrcz7/bjY2n5MIa9oIRL9gtV3ott0jwJj6SlapxA==",
       "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": "^1.14.6",
+    "@zen-browser/surfer": "^1.14.8",
     "formal-git": "^1.2.9",
     "globals": "^16.3.0",
     "husky": "^9.1.7",

prefs/firefox/browser.yaml

@@ -99,3 +99,13 @@
 # Only enabled for windows, doesn't really fit inside Zen.
 - name: browser.startup.preXulSkeletonUI
   value: false
+
+- name: browser.preonboarding.enabled
+  value: false
+
+- name: browser.referrals.enabled
+  value: false
+  locked: true
+
+- name: browser.shell.customIcon.enabled
+  value: false # For now?

prefs/firefox/performance.yaml

@@ -2,18 +2,11 @@
 # 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/.
 
-- name: browser.lowMemoryResponseMask
-  value: 3
-  condition: "defined(XP_MACOSX)"
-
-- name: network.predictor.enable-hover-on-ssl
-  value: true
-
 # See https://github.com/zen-browser/desktop/issues/11599, this pref seems to
 # have disabled itself on macos for some unknown reason.
 # Make sure its in sync with:
-# https://searchfox.org/firefox-main/rev/1477feb9706f4ccc5bd571c1c215832a6fbb7464/modules/libpref/init/StaticPrefList.yaml#7741-7748
+# https://searchfox.org/firefox-main/rev/dd2579cb6e7f1761a27ce64fb84d92c61d85c27f/modules/libpref/init/StaticPrefList.yaml#8396
 - name: gfx.webrender.compositor
-  condition: "defined(XP_WIN) || defined(XP_DARWIN)"
+  condition: "defined(XP_WIN) || defined(XP_DARWIN) || defined(MOZ_WIDGET_GTK)"
   value: "@cond"
   mirror: once

prefs/zen/macos.yaml

@@ -2,10 +2,14 @@
 # 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/.
 
-# Enable transparent background for macos
-- name: widget.macos.sidebar-blend-mode.behind-window
+# Give the whole window a translucent, blurred backdrop, using the material
+# below. See ZenWindowMaterialView in nsCocoaWindow.mm.
+- name: zen.widget.macos.window-vibrancy
   value: true
   condition: "defined(XP_MACOSX)"
+  cpptype: bool
+  mirror: always
+  type: static
 
 # 1. hudWindow
 # 2. fullScreenUI

prefs/zen/media.yaml

@@ -8,9 +8,5 @@
 - name: svg.context-properties.content.enabled
   value: true
 
-- name: image.avif.enabled
-  value: true
-  locked: true
-
 - name: media.eme.enabled
   value: true

prefs/zen/sync.yaml

@@ -1,12 +0,0 @@
-# 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/.
-
-- name: services.sync.engine.spaces
-  value: true
-  condition: "@IS_TWILIGHT@"
-
-- name: services.sync.engine.spaces
-  value: false
-  locked: true
-  condition: "!@IS_TWILIGHT@"

prefs/zen/workspaces.yaml

@@ -21,7 +21,7 @@
   value: 100
 
 - name: zen.workspaces.switch-animation-duration
-  value: 200
+  value: 250
 
 - name: zen.workspaces.wrap-around-navigation
   value: true
@@ -32,6 +32,9 @@
 - name: zen.workspaces.scroll-modifier-key
   value: ctrl
 
+- name: services.sync.engine.workspaces
+  value: false
+
 - name: zen.workspaces.separate-essentials
   value: true
 

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

scripts/update_external_patches.py

@@ -83,7 +83,7 @@ def main():
       dest = patch.get("dest")
       if not url or not dest:
         die(f"Patch entry missing 'url' or 'dest': {patch}")
-      filename = url.split("/")[-1]
+      filename = patch.get("filename", url.split("/")[-1])
       output_file = os.path.join(OUTPUT_DIR, dest, filename)
       download_patch_from_url(url, output_file)
       replaces = patch.get("replaces", {})

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/browser/base/content/aboutDialog-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/base/content/aboutDialog.js b/browser/base/content/aboutDialog.js
-index f6e1391baf12abb91c85a95107bb3923118746c0..cac04aa288e8a305d0c8b28e0c919abce87658e5 100644
+index a2fb4433c7044e7f5681d5762285314fa3e00a5c..dac1e79e86c534247a470ae062e59f7e7cba6e38 100644
 --- a/browser/base/content/aboutDialog.js
 +++ b/browser/base/content/aboutDialog.js
-@@ -52,7 +52,7 @@ function init() {
+@@ -58,7 +58,7 @@ function init() {
    ]);
    let versionIdKey = "base";
    let versionAttributes = {
@@ -11,7 +11,7 @@ index f6e1391baf12abb91c85a95107bb3923118746c0..cac04aa288e8a305d0c8b28e0c919abc
    };
  
    let arch = Services.sysinfo.get("arch");
-@@ -64,7 +64,7 @@ function init() {
+@@ -70,7 +70,7 @@ function init() {
    }
  
    let version = Services.appinfo.version;
@@ -20,7 +20,7 @@ index f6e1391baf12abb91c85a95107bb3923118746c0..cac04aa288e8a305d0c8b28e0c919abc
      versionIdKey += "-nightly";
      let buildID = Services.appinfo.appBuildID;
      let year = buildID.slice(0, 4);
-@@ -125,14 +125,6 @@ function init() {
+@@ -158,14 +158,6 @@ function init() {
        window.close();
      });
    if (AppConstants.MOZ_UPDATER) {

src/browser/base/content/aboutDialog-xhtml.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/aboutDialog.xhtml b/browser/base/content/aboutDialog.xhtml
-index 3ffd464b960a4299a7dd0cd87e4fc2f781b9d593..7a831c8ee2b73bb89bf8a82ac24958b55c16a5aa 100644
+index 067eaf8d4e23f76a2423d01a1d9fa71d9ef3c65f..e0badae05d1da7e6de43e1d517539d4b09ec90f5 100644
 --- a/browser/base/content/aboutDialog.xhtml
 +++ b/browser/base/content/aboutDialog.xhtml
 @@ -102,10 +102,6 @@
@@ -13,7 +13,7 @@ index 3ffd464b960a4299a7dd0cd87e4fc2f781b9d593..7a831c8ee2b73bb89bf8a82ac24958b5
              </vbox>
  #endif
            </hbox>
-@@ -120,26 +116,22 @@
+@@ -120,12 +116,12 @@
            <vbox id="experimental" hidden="true">
              <description class="text-blurb" id="warningDesc" data-l10n-id="warningDesc-version"></description>
              <description class="text-blurb" id="communityExperimentalDesc" data-l10n-id="community-exp">
@@ -27,13 +27,8 @@ index 3ffd464b960a4299a7dd0cd87e4fc2f781b9d593..7a831c8ee2b73bb89bf8a82ac24958b5
 +            <label is="text-link" href="https://github.com/zen-browser/desktop" data-l10n-name="community-mozillaLink"/>
              <label is="text-link" useoriginprincipal="true" href="about:credits" data-l10n-name="community-creditsLink"/>
            </description>
--          <description class="text-blurb" id="contributeDesc" data-l10n-id="helpus">
--            <label is="text-link" href="https://foundation.mozilla.org/?form=firefox-about" data-l10n-name="helpus-donateLink"/>
--            <label is="text-link" href="https://www.mozilla.org/contribute/?utm_source=firefox-browser&#38;utm_medium=firefox-desktop&#38;utm_campaign=about-dialog" data-l10n-name="helpus-getInvolvedLink"/>
--          </description>
-         </vbox>
-       </vbox>
-     </hbox>
+           <description class="text-blurb" id="contributeDesc" data-l10n-id="helpus">
+@@ -144,8 +140,8 @@
      <vbox id="bottomBox">
        <hbox pack="center">
          <label is="text-link" class="bottom-link" useoriginprincipal="true" href="about:license" data-l10n-id="bottomLinks-license"/>

src/browser/base/content/browser-box-inc-xhtml.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/browser-box.inc.xhtml b/browser/base/content/browser-box.inc.xhtml
-index 4a16fe93daeefb88af024c1dac05bc1f518c3fcb..a420768e4047937c8becefb69c1017e13fc12231 100644
+index cf35762fdcc4716932c7af7cf4af4b2f72aea038..6c13e42806ce80accce464d7ec7e022a0d8e0078 100644
 --- a/browser/base/content/browser-box.inc.xhtml
 +++ b/browser/base/content/browser-box.inc.xhtml
 @@ -3,12 +3,22 @@
@@ -28,12 +28,12 @@ index 4a16fe93daeefb88af024c1dac05bc1f518c3fcb..a420768e4047937c8becefb69c1017e1
 @@ -25,7 +35,7 @@
      </stack>
    </vbox>
-   <splitter id="sidebar-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="sibling" resizeafter="none" hidden="true"/>
+   <splitter id="sidebar-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="sibling" resizeafter="none" hidden="true" role="separator" aria-controls="sidebar-box" data-l10n-id="sidebar-resize-splitter"/>
 -  <tabbox id="tabbrowser-tabbox" flex="1" tabcontainer="tabbrowser-tabs">
 +#include zen-tabbrowser-elements.inc.xhtml
      <tabpanels id="tabbrowser-tabpanels" flex="1" selectedIndex="0"/>
    </tabbox>
-   <splitter id="ai-window-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="none" resizeafter="sibling" collapsed="true"/>
+   <splitter id="ai-window-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="sibling" resizeafter="sibling" collapsed="true"/>
 @@ -34,3 +44,5 @@
      </stack>
    </vbox>

src/browser/base/content/browser-fullScreenAndPointerLock-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/browser-fullScreenAndPointerLock.js b/browser/base/content/browser-fullScreenAndPointerLock.js
-index d0d3b6fc57800b073bb1c75f6e55212749815b0a..f3d5790eed58f1cb9a36229582e0fa00f3668962 100644
+index 991cbab1fca19bc20adabb73c146c26a57db68eb..5c0debc58c9614b13916e758c7f64b522756c1d4 100644
 --- a/browser/base/content/browser-fullScreenAndPointerLock.js
 +++ b/browser/base/content/browser-fullScreenAndPointerLock.js
 @@ -502,8 +502,6 @@ var FullScreen = {
@@ -7,7 +7,7 @@ index d0d3b6fc57800b073bb1c75f6e55212749815b0a..f3d5790eed58f1cb9a36229582e0fa00
      let translate = shiftSize > 0 ? `0 ${shiftSize}px` : "";
      gNavToolbox.classList.toggle("fullscreen-floating-toolbox", shiftSize > 0);
 -    gNavToolbox.style.translate = translate;
--    gURLBar.style.translate = gURLBar.hasAttribute("breakout") ? translate : "";
-     let searchbar = document.getElementById("searchbar-new");
-     if (searchbar) {
-       searchbar.style.translate = searchbar.hasAttribute("breakout")
+-    gURLBar.style.setProperty("--toolbar-shift-translate", translate);
+     document
+       .getElementById("searchbar-new")
+       ?.style.setProperty("--toolbar-shift-translate", translate);

src/browser/base/content/browser-js.patch

@@ -1,16 +1,16 @@
 diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
-index 1026474bb1bc026987be01a8c18fa0927cb911bc..60294e0587147d86ace8e6d6985d8c6eae8248b6 100644
+index 4960f4baed32a9e9f523262591eb93550ca9c4b0..9ee825057b1b3b5a08e1d2b2c1036f1be2088da6 100644
 --- a/browser/base/content/browser.js
 +++ b/browser/base/content/browser.js
 @@ -34,6 +34,7 @@ ChromeUtils.defineESModuleGetters(this, {
-     "resource://gre/modules/ContextualIdentityService.sys.mjs",
+     "moz-src:///toolkit/components/contextualidentity/ContextualIdentityService.sys.mjs",
    CustomizableUI:
      "moz-src:///browser/components/customizableui/CustomizableUI.sys.mjs",
 +  ZenCustomizableUI: "resource:///modules/ZenCustomizableUI.sys.mjs",
    DevToolsSocketStatus:
      "resource://devtools/shared/security/DevToolsSocketStatus.sys.mjs",
    DownloadUtils: "resource://gre/modules/DownloadUtils.sys.mjs",
-@@ -816,7 +817,12 @@ function UpdateBackForwardCommands(aWebNavigation) {
+@@ -831,7 +832,12 @@ function UpdateBackForwardCommands(aWebNavigation) {
  
    var backDisabled = backCommand.hasAttribute("disabled");
    var forwardDisabled = forwardCommand.hasAttribute("disabled");
@@ -24,7 +24,7 @@ index 1026474bb1bc026987be01a8c18fa0927cb911bc..60294e0587147d86ace8e6d6985d8c6e
      if (backDisabled) {
        backCommand.removeAttribute("disabled");
      } else {
-@@ -3719,7 +3725,7 @@ function warnAboutClosingWindow() {
+@@ -3973,7 +3979,7 @@ function warnAboutClosingWindow() {
  
    if (!isPBWindow && !toolbar.visible) {
      return gBrowser.warnAboutClosingTabs(
@@ -33,7 +33,7 @@ index 1026474bb1bc026987be01a8c18fa0927cb911bc..60294e0587147d86ace8e6d6985d8c6e
        gBrowser.closingTabsEnum.ALL
      );
    }
-@@ -3759,7 +3765,7 @@ function warnAboutClosingWindow() {
+@@ -4013,7 +4019,7 @@ function warnAboutClosingWindow() {
      return (
        isPBWindow ||
        gBrowser.warnAboutClosingTabs(
@@ -42,7 +42,7 @@ index 1026474bb1bc026987be01a8c18fa0927cb911bc..60294e0587147d86ace8e6d6985d8c6e
          gBrowser.closingTabsEnum.ALL
        )
      );
-@@ -3784,7 +3790,7 @@ function warnAboutClosingWindow() {
+@@ -4038,7 +4044,7 @@ function warnAboutClosingWindow() {
      AppConstants.platform != "macosx" ||
      isPBWindow ||
      gBrowser.warnAboutClosingTabs(
@@ -51,7 +51,7 @@ index 1026474bb1bc026987be01a8c18fa0927cb911bc..60294e0587147d86ace8e6d6985d8c6e
        gBrowser.closingTabsEnum.ALL
      )
    );
-@@ -4744,6 +4750,16 @@ var ConfirmationHint = {
+@@ -4998,6 +5004,16 @@ var ConfirmationHint = {
      }
  
      document.l10n.setAttributes(this._message, messageId, l10nArgs);

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 e7e94e13a990c154fb54bda4a3420ca00bdac009..8253b7d403734973729a5982cceafc12bab24f54 100644
+index dd2f391096968564086911c532f696dc7ffb8ae1..3de617bf4fb7fa35f7d4d7b618e4673b72b953ee 100644
 --- a/browser/base/content/navigator-toolbox.inc.xhtml
 +++ b/browser/base/content/navigator-toolbox.inc.xhtml
 @@ -2,7 +2,7 @@
@@ -26,7 +26,7 @@ index e7e94e13a990c154fb54bda4a3420ca00bdac009..8253b7d403734973729a5982cceafc12
    <toolbar id="TabsToolbar"
             class="browser-toolbar browser-titlebar"
             fullscreentoolbar="true"
-@@ -62,6 +66,8 @@
+@@ -54,6 +58,8 @@
            <html:sidebar-pins-promo id="drag-to-pin-promo-card"></html:sidebar-pins-promo>
            <arrowscrollbox id="pinned-tabs-container" orient="horizontal" clicktoscroll=""></arrowscrollbox>
            <splitter orient="vertical" id="vertical-pinned-tabs-splitter" resizebefore="sibling" resizeafter="none" hidden="true"/>
@@ -34,8 +34,8 @@ index e7e94e13a990c154fb54bda4a3420ca00bdac009..8253b7d403734973729a5982cceafc12
 +<html:div id="zen-tabs-wrapper">
            <hbox class="tab-drop-indicator" hidden="true"/>
            <arrowscrollbox id="tabbrowser-arrowscrollbox" orient="horizontal" flex="1" clicktoscroll="" scrolledtostart="" scrolledtoend="">
-             <tab is="tabbrowser-tab" class="tabbrowser-tab" selected="true" visuallyselected="" fadein=""/>
-@@ -81,6 +87,7 @@
+             <tab is="tabbrowser-tab" class="tabbrowser-tab" selected="" visuallyselected="" fadein=""/>
+@@ -73,6 +79,7 @@
                                tooltip="dynamic-shortcut-tooltip"
                                data-l10n-id="tabs-toolbar-new-tab"/>
            <html:span id="tabbrowser-tab-a11y-desc" hidden="true"/>
@@ -43,7 +43,7 @@ index e7e94e13a990c154fb54bda4a3420ca00bdac009..8253b7d403734973729a5982cceafc12
          </tabs>
  
          <toolbarbutton id="new-tab-button"
-@@ -115,9 +122,10 @@
+@@ -99,9 +106,10 @@
  
      <toolbarbutton class="content-analysis-indicator toolbarbutton-1 content-analysis-indicator-icon"/>
  

src/browser/components/aiwindow/ui/modules/AIWindow-sys-mjs.patch

@@ -1,12 +1,12 @@
 diff --git a/browser/components/aiwindow/ui/modules/AIWindow.sys.mjs b/browser/components/aiwindow/ui/modules/AIWindow.sys.mjs
-index 88c3545431cf1a300d968c296d9b171871b15fe5..754cd644f2e7b82db40d5c06618ac1764424484c 100644
+index e0b78c29ad081e6eb541eb2aeae4cb6d5cbb9b9b..ae56a624523bee66bc1d1343b455fc7cb65ebef1 100644
 --- a/browser/components/aiwindow/ui/modules/AIWindow.sys.mjs
 +++ b/browser/components/aiwindow/ui/modules/AIWindow.sys.mjs
-@@ -308,6 +308,7 @@ export const AIWindow = {
-   },
- 
-   _updateToolbarButtonPositions(win) {
+@@ -321,6 +321,7 @@ export const AIWindow = {
+    * @param {boolean} [options.isToggling]
+    */
+   _updateHamburgerMenuPosition(win, { isToggling = false } = {}) {
 +    return;
-     const modeSwitcherButton = win.document.getElementById("ai-window-toggle");
      const hamburgerMenu = win.document.getElementById("PanelUI-button");
-     const hamburgerMenuShouldBeAdjacent =
+     const targetToolbar = win.document.getElementById(
+       this.verticalTabsEnabled ? "nav-bar" : "TabsToolbar"

src/browser/components/asrouter/modules/FeatureCallout-sys-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/asrouter/modules/FeatureCallout.sys.mjs b/browser/components/asrouter/modules/FeatureCallout.sys.mjs
-index c4638d2d557f05fa6638cd379be8e0076336f8dc..2e25f485aa94485d12ca9e98aa4eaf56a06cf1f8 100644
+index f6230d6f7ed589f4336387b6115ae4527cdb071b..a289f7b3a665154025121cc9184ab851a74ea33d 100644
 --- a/browser/components/asrouter/modules/FeatureCallout.sys.mjs
 +++ b/browser/components/asrouter/modules/FeatureCallout.sys.mjs
-@@ -778,6 +778,7 @@ export class FeatureCallout {
+@@ -812,6 +812,7 @@ export class FeatureCallout {
      ) {
        return false;
      }
@@ -10,3 +10,11 @@ index c4638d2d557f05fa6638cd379be8e0076336f8dc..2e25f485aa94485d12ca9e98aa4eaf56
  
      const style = this.win.getComputedStyle(el);
      return style?.visibility === "visible" && style?.display !== "none";
+@@ -1115,7 +1116,6 @@ export class FeatureCallout {
+             type="arrow"
+             consumeoutsideclicks="never"
+             norolluponanchor="true"
+-            nonnative=""
+             position="${panel_position?.panel_position_string}"
+             ${hide_arrow ? "" : 'show-arrow=""'}
+             ${autohide ? "" : 'noautohide="true"'}

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 d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80bbcf503b2 100644
+index 491161e48044f75167a8e8a0348779cfa22fc40e..867d51b8a6b74f841afc6d84dcdfd8f2681652e5 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 d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
    HomePage: "resource:///modules/HomePage.sys.mjs",
    PanelMultiView:
      "moz-src:///browser/components/customizableui/PanelMultiView.sys.mjs",
-@@ -347,7 +348,7 @@ var CustomizableUIInternal = {
+@@ -348,7 +349,7 @@ var CustomizableUIInternal = {
        {
          type: CustomizableUI.TYPE_PANEL,
          defaultPlacements: [],
@@ -19,7 +19,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
        },
        false
      );
-@@ -357,20 +358,15 @@ var CustomizableUIInternal = {
+@@ -358,27 +359,23 @@ var CustomizableUIInternal = {
        "back-button",
        "forward-button",
        "stop-reload-button",
@@ -41,27 +41,26 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      this.registerArea(
        CustomizableUI.AREA_NAVBAR,
        {
-@@ -378,8 +374,6 @@ var CustomizableUIInternal = {
+         type: CustomizableUI.TYPE_TOOLBAR,
          overflowable: true,
          defaultPlacements: navbarPlacements,
-         verticalTabsDefaultPlacements: [
--          "firefox-view-button",
--          "alltabs-button",
-         ],
+-        verticalTabsDefaultPlacements: ["alltabs-button", "ai-window-toggle"],
++        verticalTabsDefaultPlacements: [
++        ],
          defaultCollapsed: false,
        },
-@@ -403,10 +397,7 @@ var CustomizableUIInternal = {
-       {
+       true
+@@ -402,9 +399,6 @@ var CustomizableUIInternal = {
          type: CustomizableUI.TYPE_TOOLBAR,
          defaultPlacements: [
--          "firefox-view-button",
            "tabbrowser-tabs",
 -          "new-tab-button",
 -          "alltabs-button",
+-          "ai-window-toggle",
          ],
          verticalTabsDefaultPlacements: [],
          defaultCollapsed: null,
-@@ -486,6 +477,7 @@ var CustomizableUIInternal = {
+@@ -484,6 +478,7 @@ var CustomizableUIInternal = {
        CustomizableUI.AREA_NAVBAR,
        CustomizableUI.AREA_BOOKMARKS,
        CustomizableUI.AREA_TABSTRIP,
@@ -69,7 +68,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      ]);
      if (AppConstants.platform != "macosx") {
        toolbars.add(CustomizableUI.AREA_MENUBAR);
-@@ -1262,6 +1254,9 @@ var CustomizableUIInternal = {
+@@ -1285,6 +1280,9 @@ var CustomizableUIInternal = {
          placements = gPlacements.get(area);
        }
  
@@ -79,7 +78,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
        // For toolbars that need it, mark as dirty.
        let defaultPlacements = areaProperties.get("defaultPlacements");
        if (
-@@ -1769,7 +1764,6 @@ var CustomizableUIInternal = {
+@@ -1793,7 +1791,6 @@ var CustomizableUIInternal = {
          lazy.log.info(
            "Widget " + aWidgetId + " not found, unable to remove from " + aArea
          );
@@ -87,7 +86,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
        }
  
        this.notifyDOMChange(widgetNode, null, container, true, () => {
-@@ -1779,7 +1773,7 @@ var CustomizableUIInternal = {
+@@ -1803,7 +1800,7 @@ 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)) {
@@ -96,7 +95,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
          } else {
            window.gNavToolbox.palette.appendChild(widgetNode);
          }
-@@ -1947,16 +1941,16 @@ var CustomizableUIInternal = {
+@@ -1971,16 +1968,16 @@ var CustomizableUIInternal = {
          elem.setAttribute("skipintoolbarset", "true");
        }
      }
@@ -116,7 +115,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      // Handle initial state of vertical tabs.
      if (isVerticalTabs) {
        // Show the vertical tabs toolbar
-@@ -2198,6 +2192,10 @@ var CustomizableUIInternal = {
+@@ -2222,6 +2219,10 @@ var CustomizableUIInternal = {
     *   The identifier string of the area that aNode is being inserted into.
     */
    insertWidgetBefore(aNode, aNextNode, aContainer, aAreaId) {
@@ -127,7 +126,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      this.notifyDOMChange(aNode, aNextNode, aContainer, false, () => {
        this.setLocationAttributes(aNode, aAreaId);
        aContainer.insertBefore(aNode, aNextNode);
-@@ -4562,7 +4560,7 @@ var CustomizableUIInternal = {
+@@ -4592,7 +4593,7 @@ var CustomizableUIInternal = {
     * For all registered areas, builds those areas to reflect the current
     * placement state of all widgets.
     */
@@ -136,7 +135,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      for (let [areaId, areaNodes] of gBuildAreas) {
        let placements = gPlacements.get(areaId);
        let isFirstChangedToolbar = true;
-@@ -4573,7 +4571,7 @@ var CustomizableUIInternal = {
+@@ -4603,7 +4604,7 @@ var CustomizableUIInternal = {
          if (area.get("type") == CustomizableUI.TYPE_TOOLBAR) {
            let defaultCollapsed = area.get("defaultCollapsed");
            let win = areaNode.documentGlobal;
@@ -145,7 +144,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
              win.setToolbarVisibility(
                areaNode,
                typeof defaultCollapsed == "string"
-@@ -5864,6 +5862,7 @@ export var CustomizableUI = {
+@@ -5899,6 +5900,7 @@ export var CustomizableUI = {
    unregisterArea(aName, aDestroyPlacements) {
      CustomizableUIInternal.unregisterArea(aName, aDestroyPlacements);
    },
@@ -153,7 +152,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
    /**
     * Add a widget to an area.
     * If the area to which you try to add is not known to CustomizableUI,
-@@ -7827,7 +7826,9 @@ class OverflowableToolbar {
+@@ -7869,7 +7871,9 @@ class OverflowableToolbar {
          );
  
          if (webExtList && CustomizableUI.isWebExtensionWidget(child.id)) {
@@ -163,7 +162,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
            webExtList.insertBefore(child, webExtList.firstElementChild);
          } else {
            child.setAttribute("cui-anchorid", this.#defaultListButton.id);
-@@ -7887,7 +7888,7 @@ class OverflowableToolbar {
+@@ -7929,7 +7933,7 @@ class OverflowableToolbar {
          ) {
            continue;
          }
@@ -172,7 +171,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
          if (child != aExceptChild) {
            sum += getInlineSize(child);
          }
-@@ -7911,11 +7912,11 @@ class OverflowableToolbar {
+@@ -7953,11 +7957,11 @@ class OverflowableToolbar {
          parseFloat(style.paddingLeft) -
          parseFloat(style.paddingRight) -
          toolbarChildrenWidth;
@@ -186,7 +185,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      });
  
      lazy.log.debug(
-@@ -7930,7 +7931,39 @@ class OverflowableToolbar {
+@@ -7972,7 +7976,39 @@ class OverflowableToolbar {
        Math.max(targetWidth, targetChildrenWidth)
      );
      totalAvailWidth = Math.ceil(totalAvailWidth);
@@ -227,7 +226,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      return { isOverflowing, targetContentWidth, totalAvailWidth };
    }
  
-@@ -7991,7 +8024,11 @@ class OverflowableToolbar {
+@@ -8033,7 +8069,11 @@ class OverflowableToolbar {
              return;
            }
          }
@@ -240,7 +239,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
            lazy.log.debug(
              `Need ${minSize} but width is ${totalAvailWidth} so bailing`
            );
-@@ -8024,7 +8061,7 @@ class OverflowableToolbar {
+@@ -8066,7 +8106,7 @@ class OverflowableToolbar {
          }
        }
        if (!inserted) {
@@ -249,7 +248,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
        }
        child.removeAttribute("cui-anchorid");
        child.removeAttribute("overflowedItem");
-@@ -8150,6 +8187,9 @@ class OverflowableToolbar {
+@@ -8192,6 +8232,9 @@ class OverflowableToolbar {
     *   if no such list exists.
     */
    get #webExtList() {
@@ -259,7 +258,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      if (!this.#webExtListRef) {
        let targetID = this.#toolbar.getAttribute("addon-webext-overflowtarget");
        if (!targetID) {
-@@ -8161,6 +8201,9 @@ class OverflowableToolbar {
+@@ -8203,6 +8246,9 @@ class OverflowableToolbar {
        let win = this.#toolbar.documentGlobal;
        let { panel } = win.gUnifiedExtensions;
        this.#webExtListRef = panel.querySelector(`#${targetID}`);
@@ -269,7 +268,7 @@ index d5d4596739cde5d3d49d6294867f5da122c526b8..c206cfb374542c496be9bf0305a0a80b
      }
      return this.#webExtListRef;
    }
-@@ -8369,7 +8412,7 @@ class OverflowableToolbar {
+@@ -8411,7 +8457,7 @@ class OverflowableToolbar {
          break;
        }
        case "mousedown": {

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

@@ -1,20 +0,0 @@
-diff --git a/browser/components/preferences/config/account-sync.mjs b/browser/components/preferences/config/account-sync.mjs
-index b503987a08e2ce64bfc01c4e3a21e5e19ef834f0..b1c03a0b219fd3eddd93c1deaeb18ab79c85f168 100644
---- a/browser/components/preferences/config/account-sync.mjs
-+++ b/browser/components/preferences/config/account-sync.mjs
-@@ -42,6 +42,7 @@ Preferences.addAll([
-   { id: "services.sync.engine.creditcards", type: "bool" },
-   { id: "services.sync.engine.addons", type: "bool" },
-   { id: "services.sync.engine.prefs", type: "bool" },
-+  { id: "services.sync.engine.spaces", type: "bool" },
- ]);
- 
- /**
-@@ -546,6 +547,7 @@ const SYNC_ENGINE_SETTINGS = [
-     type: "payments",
-   },
-   { id: "syncAddons", pref: "services.sync.engine.addons", type: "addons" },
-+  { id: "syncSpaces", pref: "services.sync.engine.spaces", type: "workspaces" },
-   { id: "syncSettings", pref: "services.sync.engine.prefs", type: "settings" },
- ];
- 

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

@@ -6,7 +6,7 @@ index 64aa0d98a0622c01f3dcfff1a04bfcda368354d2..2013e04b0881ad2295d6897b91e1573c
    { id: "services.sync.engine.passwords", type: "bool" },
    { id: "services.sync.engine.addresses", type: "bool" },
    { id: "services.sync.engine.creditcards", type: "bool" },
-+  { id: "services.sync.engine.spaces", type: "bool" },
++  { id: "services.sync.engine.workspaces", type: "bool" },
  ]);
  
  let gSyncChooseWhatToSync = {

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

@@ -20,7 +20,7 @@ index a893c5ec3d007820d98f5d92dd039640faa2c181..9cbd00102e44ccf98b37845474d92d57
 +      <html:div class="sync-engine-workspaces">
 +        <checkbox
 +                data-l10n-id="sync-engine-workspaces"
-+                preference="services.sync.engine.spaces"
++                preference="services.sync.engine.workspaces"
 +        />
 +      </html:div>
      </html:div>

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

@@ -1,8 +1,8 @@
 diff --git a/browser/components/preferences/main.js b/browser/components/preferences/main.js
-index fcbd421c99b24e53e46131a1e21ec690814cbf4f..fe3778a57aaeebc53f7f6763ea234cbb41816186 100644
+index 88675d1bcbf000b10d85a9c0980bc6069d88052c..ed3a1e809eb0fcccc5a957be7affb77be8978e32 100644
 --- a/browser/components/preferences/main.js
 +++ b/browser/components/preferences/main.js
-@@ -662,6 +662,11 @@ function createStartupConfig(hidden = false) {
+@@ -528,6 +528,11 @@ function createStartupConfig(hidden = false) {
            },
          ],
        },
@@ -14,16 +14,16 @@ index fcbd421c99b24e53e46131a1e21ec690814cbf4f..fe3778a57aaeebc53f7f6763ea234cbb
        {
          id: "windowsLaunchOnLogin",
          l10nId: "windows-launch-on-login",
-@@ -709,7 +714,7 @@ function createStartupConfig(hidden = false) {
+@@ -575,7 +580,7 @@ function createStartupConfig(hidden = false) {
  SettingGroupManager.registerGroups({
    defaultBrowser: createDefaultBrowserConfig(),
    startup: createStartupConfig(
--    Services.prefs.getBoolPref("browser-settings-redesign.enabled", false)
+-    Services.prefs.getBoolPref("browser.settings-redesign.enabled", false)
 +    false
    ),
  });
  
-@@ -762,7 +767,7 @@ function getBundleForLocales(newLocales) {
+@@ -628,7 +633,7 @@ function getBundleForLocales(newLocales) {
      ])
    );
    return new Localization(

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

@@ -6,7 +6,7 @@ index c379e1a5f82692406a92d9fcd3bca2769dfac5b2..af037dd3d995813d966524ac44a3795d
                      <image class="sync-engine-image sync-engine-prefs" alt=""/>
                      <label data-l10n-id="sync-currently-syncing-settings"/>
                    </html:div>
-+                  <html:div engine_preference="services.sync.engine.spaces">
++                  <html:div engine_preference="services.sync.engine.workspaces">
 +                    <image class="sync-engine-image sync-engine-workspaces" alt=""/>
 +                    <label data-l10n-id="sync-currently-syncing-workspaces"/>
 +                  </html:div>

src/browser/components/preferences/zen-settings.js

@@ -1184,6 +1184,11 @@ Preferences.addAll([
     type: "bool",
     default: true,
   },
+  {
+    id: "zen.view.drag-window-from-content",
+    type: "bool",
+    default: true,
+  },
   {
     id: "zen.urlbar.behavior",
     type: "string",

src/browser/components/preferences/zenLooksAndFeel.inc.xhtml

@@ -61,6 +61,15 @@
                       data-l10n-id="zen-look-and-feel-compact-toolbar-flash-popup"
                       preference="zen.view.compact.toolbar-flash-popup"/>
       </vbox>
+
+      <label><html:h2 data-l10n-id="zen-look-and-feel-window-drag-header"/></label>
+      <description class="description-deemphasized" data-l10n-id="zen-look-and-feel-window-drag-description" />
+
+      <vbox class="indent">
+            <checkbox id="zenLooksAndFeelWindowDragEnabled"
+                  data-l10n-id="zen-window-drag-enabled"
+                  preference="zen.view.drag-window-from-content"/>
+      </vbox>
 </groupbox>
 
 <hbox id="zenGlanceCategory"

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

@@ -1,8 +1,16 @@
 diff --git a/browser/components/sessionstore/TabState.sys.mjs b/browser/components/sessionstore/TabState.sys.mjs
-index 4ba4dda363b602cb6f4445ef056f2f9abb1b0e1e..6b4b407e05e26faca69d9d7ac6f31510620898fe 100644
+index a33deeb5b587d6a950960a1a4781176e4e730ad7..e96cfb9a5ffbe4feccdffa8b6d18ececb48d4c52 100644
 --- a/browser/components/sessionstore/TabState.sys.mjs
 +++ b/browser/components/sessionstore/TabState.sys.mjs
-@@ -99,10 +99,28 @@ class _TabState {
+@@ -8,6 +8,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
+   PrivacyFilter: "resource://gre/modules/sessionstore/PrivacyFilter.sys.mjs",
+   TabAttributes: "resource:///modules/sessionstore/TabAttributes.sys.mjs",
+   TabStateCache: "resource:///modules/sessionstore/TabStateCache.sys.mjs",
++  UrlbarShared: "chrome://browser/content/urlbar/UrlbarShared.mjs",
+   sessionStoreLogger: "resource:///modules/sessionstore/SessionLogger.sys.mjs",
+ });
+ 
+@@ -103,10 +104,28 @@ class _TabState {
        }
      }
  
@@ -25,7 +33,7 @@ index 4ba4dda363b602cb6f4445ef056f2f9abb1b0e1e..6b4b407e05e26faca69d9d7ac6f31510
        browser,
        true
      );
-+    if (tabData.searchMode?.source === tab.documentGlobal.UrlbarUtils.RESULT_SOURCE.ZEN_ACTIONS) {
++    if (tabData.searchMode?.source === lazy.UrlbarShared.RESULT_SOURCE.ZEN_ACTIONS) {
 +      delete tabData.searchMode;
 +    }
  

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

@@ -0,0 +1,21 @@
+diff --git a/browser/components/tabbrowser/content/tab-context-menu.js b/browser/components/tabbrowser/content/tab-context-menu.js
+index 4a7cb33a4d9067d469bbe09d4cd8844581642f7a..d7f75471a207cccac6ca3dec49037ac30dd76163 100644
+--- a/browser/components/tabbrowser/content/tab-context-menu.js
++++ b/browser/components/tabbrowser/content/tab-context-menu.js
+@@ -839,13 +839,15 @@ var TabContextMenu = {
+     );
+     contextUnpinSelectedTabs.hidden =
+       !this.contextTab.pinned || !this.multiselected;
+-
++    gZenViewSplitter.updateContextMenuItems();
++    gZenPinnedTabManager.updatePinnedTabContextMenu(this.contextTab);
+     // 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/tab-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/tab.js b/browser/components/tabbrowser/content/tab.js
-index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce785ca5c2c3 100644
+index 6fcef5bf0f4ac8c58515afd127c7065f26251c7c..0307d79923612b8f728bf41c13b39aa8c579171b 100644
 --- a/browser/components/tabbrowser/content/tab.js
 +++ b/browser/components/tabbrowser/content/tab.js
 @@ -21,6 +21,7 @@
@@ -52,7 +52,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
          return;
        }
  
-@@ -220,11 +223,25 @@
+@@ -216,11 +219,25 @@
      }
  
      get visible() {
@@ -83,7 +83,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
      }
  
      get hidden() {
-@@ -303,7 +320,7 @@
+@@ -299,7 +316,7 @@
          return false;
        }
  
@@ -92,7 +92,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
      }
  
      get lastAccessed() {
-@@ -388,7 +405,18 @@
+@@ -384,7 +401,18 @@
      }
  
      get group() {
@@ -112,7 +112,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
      }
  
      get splitview() {
-@@ -470,6 +498,10 @@
+@@ -466,6 +494,10 @@
          }
        }
  
@@ -123,7 +123,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
        // If the previous target wasn't part of this tab then this is a mouseenter event.
        if (!this.contains(event.relatedTarget)) {
          this._mouseenter();
-@@ -499,6 +531,7 @@
+@@ -495,6 +527,7 @@
        if (!this.contains(event.relatedTarget)) {
          this._mouseleave();
        }
@@ -131,7 +131,15 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
      }
  
      on_dragstart(event) {
-@@ -533,6 +566,8 @@
+@@ -506,6 +539,7 @@
+       if (event.eventPhase == Event.CAPTURING_PHASE) {
+         this.style.MozUserFocus = "";
+       } else if (
++        event.target.classList?.contains("tab-reset-button") ||
+         event.target.classList?.contains("tab-close-button") ||
+         gSharedTabWarning.willShowSharedTabWarning(this)
+       ) {
+@@ -529,6 +563,8 @@
          this.style.MozUserFocus = "ignore";
        } else if (
          event.target.classList.contains("tab-close-button") ||
@@ -140,7 +148,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
          event.target.classList.contains("tab-icon-overlay") ||
          event.target.classList.contains("tab-audio-button")
        ) {
-@@ -567,7 +602,7 @@
+@@ -563,7 +599,7 @@
            }
          } else if (
            event.altKey &&
@@ -149,7 +157,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
          ) {
            eventMaySelectTab = false;
          } else if (!this.selected && this.multiselected) {
-@@ -592,6 +627,10 @@
+@@ -600,6 +636,10 @@
        this.style.MozUserFocus = "";
      }
  
@@ -160,7 +168,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
      on_click(event) {
        if (event.button != 0) {
          return;
-@@ -615,14 +654,31 @@
+@@ -623,14 +663,31 @@
              trigger: "alt_click",
            });
          }
@@ -193,7 +201,7 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
          gBrowser.multiSelectedTabsCount > 0 &&
          !event.target.classList.contains("tab-close-button") &&
          !event.target.classList.contains("tab-icon-overlay") &&
-@@ -634,8 +690,9 @@
+@@ -642,8 +699,9 @@
        }
  
        if (
@@ -205,16 +213,16 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
        ) {
          if (this.activeMediaBlocked) {
            if (this.multiselected) {
-@@ -653,7 +710,7 @@
+@@ -661,7 +719,7 @@
          return;
        }
  
 -      if (event.target.classList.contains("tab-close-button")) {
 +      if (!event.getModifierState("Accel") && event.target.classList.contains("tab-close-button")) {
          if (this.multiselected) {
-           gBrowser.removeMultiSelectedTabs(
-             lazy.TabMetrics.userTriggeredContext(
-@@ -673,6 +730,14 @@
+           gBrowser.removeMultiSelectedTabs({
+             metricsContext: lazy.TabMetrics.userTriggeredContext(
+@@ -681,6 +739,14 @@
          // (see tabbrowser-tabs 'click' handler).
          gBrowser.tabContainer._blockDblClick = true;
        }
@@ -229,9 +237,9 @@ index 8f2ebf3a0bd4e2af01cf41024b16bd491e8ed961..27721e26c3cd8cb066b462dedfa4ce78
      }
  
      on_dblclick(event) {
-@@ -696,6 +761,8 @@
-           animate: true,
-           triggeringEvent: event,
+@@ -707,6 +773,8 @@
+             lazy.TabMetrics.METRIC_SOURCE.TAB_STRIP
+           ),
          });
 +      } else if (this.hasAttribute('zen-essential') && !event.target.classList.contains("tab-icon-overlay")) {
 +        gZenPinnedTabManager._onTabResetPinButton(event, this, 'reset');

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 c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645eb49d12e9 100644
+index 39b5babee5942427a82a7a64ad69e1b16efebcc1..32beac13dd4215a16de3a783db6c32da5504f9d8 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
-@@ -509,6 +509,7 @@
+@@ -513,6 +513,7 @@
       * @type {MozBrowser[]}
       */
      get splitViewBrowsers() {
@@ -10,7 +10,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        const browsers = [];
        if (this.#activeSplitView) {
          for (const tab of this.#activeSplitView.tabs) {
-@@ -578,15 +579,66 @@
+@@ -611,15 +612,66 @@
        return this.tabContainer.visibleTabs;
      }
  
@@ -76,10 +76,10 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
 +      return this.tabs.filter(tab => !tab.hasAttribute("zen-glance-tab"));
 +    }
 +
-     set selectedTab(val) {
-       if (
-         gSharedTabWarning.willShowSharedTabWarning(val) ||
-@@ -595,6 +647,9 @@
+     setSelectedTab(val, metricsContext = null) {
+       if (this.selectedTab === val) {
+         return;
+@@ -632,6 +684,9 @@
        ) {
          return;
        }
@@ -88,8 +88,8 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
 +      }
        // Update the tab
        this.tabbox.selectedTab = val;
-     }
-@@ -662,6 +717,10 @@
+ 
+@@ -708,6 +763,10 @@
          userContextId = parseInt(tabArgument.getAttribute("usercontextid"), 10);
        }
  
@@ -100,7 +100,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (openWindowInfo) {
          userContextId = openWindowInfo.originAttributes.userContextId;
        }
-@@ -763,6 +822,8 @@
+@@ -809,6 +868,8 @@
        this.tabpanels.appendChild(panel);
  
        let tab = this.tabs[0];
@@ -109,10 +109,10 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        tab.linkedPanel = uniqueId;
        this._selectedTab = tab;
        this._selectedBrowser = browser;
-@@ -1129,18 +1190,24 @@
-       aTab,
-       { telemetrySource = this.TabMetrics.METRIC_SOURCE.UNKNOWN } = {}
-     ) {
+@@ -1178,18 +1239,24 @@
+      *   The context for the operation for telemetry purposes, defaults to an unknown context.
+      */
+     pinTab(aTab, { metricsContext = this.TabMetrics.UNKNOWN_CONTEXT } = {}) {
 +      aTab = gZenGlanceManager.getTabOrGlanceParent(aTab);
        if (aTab.pinned || aTab == FirefoxViewHandler.tab) {
          return;
@@ -135,10 +135,10 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        aTab.setAttribute("pinned", "true");
        this._updateTabBarForPinnedTabs();
-@@ -1148,16 +1215,25 @@
-     }
- 
-     unpinTab(aTab) {
+@@ -1206,16 +1273,25 @@
+      *   The context for the operation for telemetry purposes, defaults to an unknown context.
+      */
+     unpinTab(aTab, { metricsContext = this.TabMetrics.UNKNOWN_CONTEXT } = {}) {
 +      aTab = gZenGlanceManager.getTabOrGlanceParent(aTab);
        if (!aTab.pinned) {
          return;
@@ -162,7 +162,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        });
  
        aTab.style.marginInlineStart = "";
-@@ -1372,6 +1448,9 @@
+@@ -1430,6 +1506,9 @@
  
        let LOCAL_PROTOCOLS = ["chrome:", "about:", "resource:", "data:"];
  
@@ -172,7 +172,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (
          aIconURL &&
          !LOCAL_PROTOCOLS.some(protocol => aIconURL.startsWith(protocol))
-@@ -1381,6 +1460,9 @@
+@@ -1439,6 +1518,9 @@
          );
          return;
        }
@@ -182,7 +182,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        let browser = this.getBrowserForTab(aTab);
        browser.mIconURL = aIconURL;
-@@ -1703,7 +1785,6 @@
+@@ -1761,7 +1843,6 @@
  
        // Preview mode should not reset the owner
        if (!this.#previewMode && !oldTab.selected) {
@@ -190,7 +190,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        }
  
        let lastRelatedTab = this.#lastRelatedTabMap.get(oldTab);
-@@ -1794,6 +1875,7 @@
+@@ -1852,6 +1933,7 @@
        if (!this.#previewMode) {
          newTab.recordTimeFromUnloadToReload();
          newTab.updateLastAccessed();
@@ -198,7 +198,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          oldTab.updateLastAccessed();
          // if this is the foreground window, update the last-seen timestamps.
          if (this.documentGlobal == BrowserWindowTracker.getTopWindow()) {
-@@ -2008,6 +2090,9 @@
+@@ -2066,6 +2148,9 @@
        }
  
        let activeEl = document.activeElement;
@@ -208,7 +208,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        // If focus is on the old tab, move it to the new tab.
        if (activeEl == oldTab) {
          newTab.focus();
-@@ -2046,7 +2131,7 @@
+@@ -2104,7 +2189,7 @@
        // 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 c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          let selectURL = () => {
            if (this._asyncTabSwitching) {
              // Set _awaitingSetURI flag to suppress popup notification
-@@ -2334,7 +2419,12 @@
+@@ -2392,7 +2477,12 @@
        return this._setTabLabel(aTab, aLabel);
      }
  
@@ -231,7 +231,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (!aLabel || (isURL && /^about:reader\?url=/.test(aLabel))) {
          return false;
        }
-@@ -2460,7 +2550,7 @@
+@@ -2518,7 +2608,7 @@
          newIndex = this.selectedTab._tPos + 1;
        }
  
@@ -240,7 +240,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          if (this.isTabGroupLabel(targetTab)) {
            throw new Error(
              "Replacing a tab group label with a tab is not supported"
-@@ -2735,6 +2825,7 @@
+@@ -2793,6 +2883,7 @@
        uriIsAboutBlank,
        userContextId,
        skipLoad,
@@ -248,7 +248,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
      } = {}) {
        let b = document.createXULElement("browser");
        // Use the JSM global to create the permanentKey, so that if the
-@@ -2808,8 +2899,7 @@
+@@ -2866,8 +2957,7 @@
          // we use a different attribute name for this?
          b.setAttribute("name", name);
        }
@@ -258,7 +258,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          b.setAttribute("transparent", "true");
        }
  
-@@ -2964,7 +3054,7 @@
+@@ -3022,7 +3112,7 @@
  
        let panel = this.getPanel(browser);
        let uniqueId = this._generateUniquePanelID();
@@ -267,7 +267,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        aTab.linkedPanel = uniqueId;
  
        // Inject the <browser> into the DOM if necessary.
-@@ -3024,8 +3114,8 @@
+@@ -3082,8 +3172,8 @@
        // 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 c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        } else {
          aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
        }
-@@ -3210,7 +3300,6 @@
+@@ -3268,7 +3358,6 @@
              this.selectedTab = this.addTrustedTab(BROWSER_NEW_TAB_URL, {
                tabIndex: tab._tPos + 1,
                userContextId: tab.userContextId,
@@ -286,7 +286,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
                focusUrlBar: true,
              });
              resolve(this.selectedBrowser);
-@@ -3320,6 +3409,10 @@
+@@ -3378,6 +3467,10 @@
          schemelessInput,
          hasValidUserGestureActivation = false,
          textDirectiveUserActivation = false,
@@ -297,7 +297,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        } = {}
      ) {
        // all callers of addTab that pass a params object need to pass
-@@ -3330,10 +3423,25 @@
+@@ -3388,10 +3481,25 @@
          );
        }
  
@@ -323,7 +323,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        // If we're opening a foreground tab, set the owner by default.
        ownerTab ??= inBackground ? null : this.selectedTab;
  
-@@ -3341,6 +3449,7 @@
+@@ -3399,6 +3507,7 @@
        if (this.selectedTab.owner) {
          this.selectedTab.owner = null;
        }
@@ -331,7 +331,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        // Find the tab that opened this one, if any. This is used for
        // determining positioning, and inherited attributes such as the
-@@ -3393,6 +3502,22 @@
+@@ -3451,6 +3560,22 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -354,7 +354,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          if (insertTab) {
            // Insert the tab into the tab container in the correct position.
            this.#insertTabAtIndex(t, {
-@@ -3401,6 +3526,7 @@
+@@ -3459,6 +3584,7 @@
              ownerTab,
              openerTab,
              pinned,
@@ -362,7 +362,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
              bulkOrderedOpen,
              tabGroup: tabGroup ?? openerTab?.group,
            });
-@@ -3419,6 +3545,7 @@
+@@ -3477,6 +3603,7 @@
            openWindowInfo,
            skipLoad,
            triggeringRemoteType,
@@ -370,7 +370,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          }));
  
          if (focusUrlBar) {
-@@ -3543,6 +3670,12 @@
+@@ -3601,6 +3728,12 @@
          }
        }
  
@@ -383,7 +383,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        // Additionally send pinned tab events
        if (pinned) {
          this.#notifyPinnedStatus(t);
-@@ -3553,6 +3686,15 @@
+@@ -3611,6 +3744,15 @@
        if (!inBackground) {
          this.selectedTab = t;
        }
@@ -399,15 +399,15 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        return t;
      }
  
-@@ -3785,6 +3927,7 @@
+@@ -3834,6 +3976,7 @@
+         insertBefore = null,
          isAdoptingGroup = false,
-         isUserTriggered = false,
-         telemetryUserCreateSource = "unknown",
+         metricsContext = this.TabMetrics.UNKNOWN_CONTEXT,
 +        forSplitView = false,
        } = {}
      ) {
        if (
-@@ -3795,9 +3938,6 @@
+@@ -3844,9 +3987,6 @@
              !this.isSplitViewWrapper(tabOrSplitView)
          )
        ) {
@@ -417,7 +417,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        }
  
        if (!color) {
-@@ -3818,9 +3958,14 @@
+@@ -3867,9 +4007,14 @@
          label,
          isAdoptingGroup
        );
@@ -432,9 +432,9 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          group,
 -        insertBefore?.group ?? insertBefore
        );
-       group.addTabs(tabsAndSplitViews);
+       group.addTabs(tabsAndSplitViews, metricsContext);
  
-@@ -3941,7 +4086,7 @@
+@@ -3973,7 +4118,7 @@
        }
  
        this.#handleTabMove(tab, () =>
@@ -443,7 +443,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        );
      }
  
-@@ -4027,6 +4172,7 @@
+@@ -4059,6 +4204,7 @@
          color: group.color,
          insertBefore: newTabs[0],
          isAdoptingGroup: true,
@@ -451,7 +451,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        });
      }
  
-@@ -4237,6 +4383,7 @@
+@@ -4269,6 +4415,7 @@
          openWindowInfo,
          skipLoad,
          triggeringRemoteType,
@@ -459,7 +459,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        }
      ) {
        // If we don't have a preferred remote type (or it is `NOT_REMOTE`), and
-@@ -4297,6 +4444,7 @@
+@@ -4329,6 +4476,7 @@
            openWindowInfo,
            name,
            skipLoad,
@@ -467,7 +467,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          });
        }
  
-@@ -4510,9 +4658,9 @@
+@@ -4542,9 +4690,9 @@
          }
  
          // Add a new tab if needed.
@@ -479,7 +479,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
            let url = "about:blank";
            if (tabData.entries?.length) {
-@@ -4545,8 +4693,10 @@
+@@ -4577,8 +4725,10 @@
              insertTab: false,
              skipLoad: true,
              preferredRemoteType,
@@ -491,7 +491,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
            if (select) {
              tabToSelect = tab;
            }
-@@ -4568,7 +4718,8 @@
+@@ -4600,7 +4750,8 @@
            this.pinTab(tab);
            // Then ensure all the tab open/pinning information is sent.
            this._fireTabOpen(tab, {});
@@ -501,7 +501,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
            let { groupId } = tabData;
            const tabGroup = tabGroupWorkingData.get(groupId);
            // if a tab refers to a tab group we don't know, skip any group
-@@ -4588,7 +4739,10 @@
+@@ -4620,7 +4771,10 @@
                  tabGroup.stateData.id,
                  tabGroup.stateData.color,
                  tabGroup.stateData.collapsed,
@@ -513,7 +513,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
                );
                tabsFragment.appendChild(tabGroup.node);
              }
-@@ -4643,9 +4797,21 @@
+@@ -4675,9 +4829,21 @@
        // to remove the old selected tab.
        if (tabToSelect) {
          let leftoverTab = this.selectedTab;
@@ -535,7 +535,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        if (tabs.length > 1 || !tabs[0].selected) {
          this._updateTabsAfterInsert();
-@@ -4836,11 +5002,17 @@
+@@ -4882,11 +5048,17 @@
        if (ownerTab) {
          tab.owner = ownerTab;
        }
@@ -554,7 +554,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          if (
            !bulkOrderedOpen &&
            ((openerTab &&
-@@ -4852,7 +5024,7 @@
+@@ -4898,7 +5070,7 @@
            let lastRelatedTab =
              openerTab && this.#lastRelatedTabMap.get(openerTab);
            let previousTab = lastRelatedTab || openerTab || this.selectedTab;
@@ -563,7 +563,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
              tabGroup = previousTab.group;
            }
            if (
-@@ -4868,7 +5040,7 @@
+@@ -4914,7 +5086,7 @@
                  previousTab.splitview
                ) + 1;
            } else if (previousTab.visible) {
@@ -572,7 +572,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
            } else if (previousTab == FirefoxViewHandler.tab) {
              elementIndex = 0;
            }
-@@ -4896,14 +5068,14 @@
+@@ -4942,14 +5114,14 @@
        }
        // Ensure index is within bounds.
        if (tab.pinned) {
@@ -591,7 +591,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        if (pinned && !itemAfter?.pinned) {
          itemAfter = null;
-@@ -4920,7 +5092,7 @@
+@@ -4966,7 +5138,7 @@
  
        this.tabContainer._invalidateCachedTabs();
  
@@ -600,7 +600,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          if (
            (this.isTab(itemAfter) && itemAfter.group == tabGroup) ||
            this.isSplitViewWrapper(itemAfter)
-@@ -4951,7 +5123,11 @@
+@@ -4997,7 +5169,11 @@
          const tabContainer = pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
@@ -612,7 +612,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        }
  
        if (tab.group?.collapsed) {
-@@ -4966,6 +5142,7 @@
+@@ -5012,6 +5188,7 @@
        if (pinned) {
          this._updateTabBarForPinnedTabs();
        }
@@ -620,23 +620,23 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        TabBarVisibility.update();
      }
-@@ -5514,6 +5691,7 @@
-         telemetrySource,
+@@ -5568,6 +5745,7 @@
+         metricsContext,
        } = {}
      ) {
 +      tabs = tabs.filter(tab => !tab.hasAttribute("zen-empty-tab"));
        // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
        // can be considered equivalent to closing the window.
        if (
-@@ -5603,6 +5781,7 @@
-         if (lastToClose) {
-           this.removeTab(lastToClose, aParams);
+@@ -5678,6 +5856,7 @@
+             closedTabCount -= 1;
+           }
          }
 +        gZenUIManager.onTabClose(undefined);
-       } catch (e) {
-         console.error(e);
-       }
-@@ -5648,6 +5827,14 @@
+ 
+         if (closedTabCount > 0) {
+           this.recordTabMetrics(
+@@ -5730,6 +5909,14 @@
          return;
        }
  
@@ -651,7 +651,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        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
-@@ -5655,6 +5842,9 @@
+@@ -5737,6 +5924,9 @@
        // state).
        let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
        let isLastTab = this.#isLastTabInWindow(aTab);
@@ -661,8 +661,8 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (
          !this._beginRemoveTab(aTab, {
            closeWindowFastpath: true,
-@@ -5666,13 +5856,14 @@
-           telemetrySource,
+@@ -5747,13 +5937,14 @@
+           metricsContext,
          })
        ) {
 +        delete gZenWorkspaces._isClosingWindow;
@@ -677,7 +677,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        let lockTabSizing =
          !this.tabContainer.verticalMode &&
          !aTab.pinned &&
-@@ -5703,7 +5894,13 @@
+@@ -5784,7 +5975,13 @@
          // We're not animating, so we can cancel the animation stopwatch.
          Glean.browserTabclose.timeAnim.cancel(aTab._closeTimeAnimTimerId);
          aTab._closeTimeAnimTimerId = null;
@@ -692,7 +692,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          return;
        }
  
-@@ -5746,7 +5943,7 @@
+@@ -5827,7 +6024,7 @@
       */
      #isLastTabInWindow(tab) {
        for (const otherTab of this.tabs) {
@@ -701,7 +701,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
            return false;
          }
        }
-@@ -5837,7 +6034,7 @@
+@@ -5917,7 +6114,7 @@
            closeWindowWithLastTab != null
              ? closeWindowWithLastTab
              : !window.toolbar.visible ||
@@ -710,7 +710,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
          if (closeWindow) {
            // We've already called beforeunload on all the relevant tabs if we get here,
-@@ -5861,6 +6058,7 @@
+@@ -5941,6 +6138,7 @@
  
          newTab = true;
        }
@@ -718,7 +718,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        aTab._endRemoveArgs = [closeWindow, newTab];
  
        // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -5901,13 +6099,7 @@
+@@ -5982,13 +6180,7 @@
        aTab._mouseleave();
  
        if (newTab) {
@@ -733,7 +733,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        } else {
          TabBarVisibility.update();
        }
-@@ -6040,6 +6232,7 @@
+@@ -6128,6 +6320,7 @@
          this.tabs[i]._tPos = i;
        }
  
@@ -741,7 +741,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (!this.#windowIsClosing) {
          // update tab close buttons state
          this.tabContainer._updateCloseButtons();
-@@ -6225,6 +6418,7 @@
+@@ -6313,6 +6506,7 @@
          memory_after: await getTotalMemoryUsage(),
          time_to_unload_in_ms: timeElapsed,
        });
@@ -749,7 +749,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
      }
  
      /**
-@@ -6270,6 +6464,7 @@
+@@ -6358,6 +6552,7 @@
        }
  
        let excludeTabs = new Set(aExcludeTabs);
@@ -757,7 +757,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        // If this tab has a successor, it should be selectable, since
        // hiding or closing a tab removes that tab as a successor.
-@@ -6282,15 +6477,22 @@
+@@ -6370,13 +6565,13 @@
          !excludeTabs.has(aTab.owner) &&
          Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
        ) {
@@ -772,6 +772,11 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
 +        tab => !excludeTabs.has(tab) && gZenWorkspaces._shouldChangeToTab(tab) && tab !== aTab
        );
  
+       if (Services.prefs.getBoolPref("browser.tabs.selectMRUOnClose", false)) {
+@@ -6392,6 +6587,13 @@
+         }
+       }
+ 
 +      if (remainingTabs.length > 0 && Services.prefs.getBoolPref("zen.tabs.select-recently-used-on-close")) {
 +        let mostRecentTab = remainingTabs.reduce((a, b) =>
 +          b.lastAccessed > a.lastAccessed ? b : a
@@ -782,7 +787,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        let tab = this.tabContainer.findNextTab(aTab, {
          direction: 1,
          filter: _tab => remainingTabs.includes(_tab),
-@@ -6304,7 +6506,7 @@
+@@ -6405,7 +6607,7 @@
        }
  
        if (tab) {
@@ -791,7 +796,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        }
  
        // If no qualifying visible tab was found, see if there is a tab in
-@@ -6325,7 +6527,7 @@
+@@ -6426,7 +6628,7 @@
          });
        }
  
@@ -800,7 +805,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
      }
  
      _blurTab(aTab) {
-@@ -6336,7 +6538,7 @@
+@@ -6437,7 +6639,7 @@
       * @returns {boolean}
       *   False if swapping isn't permitted, true otherwise.
       */
@@ -809,7 +814,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        // Do not allow transfering a private tab to a non-private window
        // and vice versa.
        if (
-@@ -6390,6 +6592,7 @@
+@@ -6491,6 +6693,7 @@
        // fire the beforeunload event in the process.  Close the other
        // window if this was its last tab.
        if (
@@ -817,7 +822,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          !remoteBrowser._beginRemoveTab(aOtherTab, {
            adoptedByTab: aOurTab,
            closeWindowWithLastTab: true,
-@@ -6401,7 +6604,7 @@
+@@ -6502,7 +6705,7 @@
        // 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.
@@ -826,7 +831,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (closeWindow) {
          let win = aOtherTab.documentGlobal;
          win.windowUtils.suppressAnimation(true);
-@@ -6535,11 +6738,13 @@
+@@ -6636,11 +6839,13 @@
        }
  
        // Finish tearing down the tab that's going away.
@@ -840,7 +845,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        this.setTabTitle(aOurTab);
  
-@@ -6759,10 +6964,10 @@
+@@ -6860,10 +7065,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      }
  
@@ -853,7 +858,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -6822,7 +7027,8 @@
+@@ -6923,7 +7128,8 @@
       * @param {object} [aOptions={}]
       *   Key-value pairs that will be serialized into the features string.
       */
@@ -863,7 +868,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        if (this.tabs.length == 1) {
          return null;
        }
-@@ -6839,7 +7045,7 @@
+@@ -6940,7 +7146,7 @@
        // tell a new window to take the "dropped" tab
        let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
        args.appendElement(aTab.splitview ?? aTab);
@@ -872,7 +877,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          private: PrivateBrowsingUtils.isWindowPrivate(window),
          features: Object.entries(aOptions)
            .map(([key, value]) => `${key}=${value}`)
-@@ -6847,6 +7053,8 @@
+@@ -6948,6 +7154,8 @@
          openerWindow: window,
          args,
        });
@@ -881,7 +886,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
      }
  
      /**
-@@ -6959,7 +7167,7 @@
+@@ -7074,7 +7282,7 @@
       *   `true` if element is a `<tab-group>`
       */
      isTabGroup(element) {
@@ -890,7 +895,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
      }
  
      /**
-@@ -7044,8 +7252,8 @@
+@@ -7146,8 +7354,8 @@
        }
  
        // Don't allow mixing pinned and unpinned tabs.
@@ -901,7 +906,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        } else {
          tabIndex = Math.max(tabIndex, this.pinnedTabCount);
        }
-@@ -7091,8 +7299,8 @@
+@@ -7193,8 +7401,8 @@
        this.#handleTabMove(
          element,
          () => {
@@ -912,7 +917,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
              neighbor = neighbor.group;
            }
            if (neighbor?.splitview) {
-@@ -7103,6 +7311,12 @@
+@@ -7205,6 +7413,12 @@
                return;
              }
            }
@@ -925,8 +930,8 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
            if (movingForwards && neighbor) {
              neighbor.after(element);
-@@ -7161,23 +7375,31 @@
-     #moveTabNextTo(element, targetElement, moveBefore = false, metricsContext) {
+@@ -7278,23 +7492,31 @@
+     ) {
        if (this.isTabGroupLabel(targetElement)) {
          targetElement = targetElement.group;
 -        if (!moveBefore && !targetElement.collapsed) {
@@ -963,7 +968,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        } 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
-@@ -7190,12 +7412,35 @@
+@@ -7307,12 +7529,35 @@
          //    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.
@@ -1000,7 +1005,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        // 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.
-@@ -7204,6 +7449,7 @@
+@@ -7321,6 +7566,7 @@
        }
  
        let getContainer = () =>
@@ -1008,7 +1013,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          element.pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
-@@ -7212,11 +7458,15 @@
+@@ -7329,11 +7575,15 @@
          element,
          () => {
            if (moveBefore) {
@@ -1024,11 +1029,11 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
 +            }
            }
          },
-         metricsContext
-@@ -7290,11 +7540,15 @@
-      * @param {TabMetricsContext} [metricsContext]
+         { metricsContext }
+@@ -7411,11 +7661,15 @@
+      *   The context for the operation for telemetry purposes.
       */
-     moveTabToExistingGroup(aTab, aGroup, metricsContext) {
+     moveTabToExistingGroup(aTab, aGroup, { metricsContext } = {}) {
 -      if (!this.isTab(aTab)) {
 +      if (!this.isTab(aTab) && !aTab.hasAttribute('split-view-group')) {
          throw new Error("Can only move a tab into a tab group");
@@ -1044,7 +1049,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        }
        if (aTab.group && aTab.group.id === aGroup.id) {
          return;
-@@ -7366,6 +7620,7 @@
+@@ -7489,6 +7743,7 @@
  
        let state = {
          tabIndex: tab._tPos,
@@ -1052,7 +1057,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        };
        if (tab.visible) {
          state.elementIndex = tab.elementIndex;
-@@ -7397,7 +7652,7 @@
+@@ -7527,7 +7782,7 @@
        let changedSplitView =
          previousTabState.splitViewId != currentTabState.splitViewId;
  
@@ -1061,7 +1066,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          tab.dispatchEvent(
            new CustomEvent("TabMove", {
              bubbles: true,
-@@ -7444,6 +7699,10 @@
+@@ -7579,6 +7834,10 @@
  
        moveActionCallback();
  
@@ -1072,7 +1077,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        // Clear tabs cache after moving nodes because the order of tabs may have
        // changed.
        this.tabContainer._invalidateCachedTabs();
-@@ -7494,7 +7753,22 @@
+@@ -7626,7 +7885,22 @@
       * @returns {object}
       *    The new tab in the current window, null if the tab couldn't be adopted.
       */
@@ -1096,7 +1101,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        // 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
-@@ -7537,6 +7811,8 @@
+@@ -7669,6 +7943,8 @@
        }
        params.skipLoad = true;
        let newTab = this.addWebTab("about:blank", params);
@@ -1105,7 +1110,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
        aTab.container.tabDragAndDrop.finishAnimateTabMove();
  
-@@ -8247,7 +8523,7 @@
+@@ -8448,7 +8724,7 @@
          // preventDefault(). It will still raise the window if appropriate.
          return;
        }
@@ -1114,7 +1119,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        window.focus();
        aEvent.preventDefault();
      }
-@@ -8264,7 +8540,6 @@
+@@ -8465,7 +8741,6 @@
  
      on_TabGroupCollapse(aEvent) {
        aEvent.target.tabs.forEach(tab => {
@@ -1122,7 +1127,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
        });
      }
  
-@@ -8618,7 +8893,9 @@
+@@ -8819,7 +9094,9 @@
  
          let filter = this.#tabFilters.get(tab);
          if (filter) {
@@ -1132,7 +1137,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
  
            let listener = this.#tabListeners.get(tab);
            if (listener) {
-@@ -9423,6 +9700,7 @@
+@@ -9604,6 +9881,7 @@
              aWebProgress.isTopLevel
            ) {
              this._tab.setAttribute("busy", "true");
@@ -1140,7 +1145,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
              gBrowser._tabAttrModified(this._tab, ["busy"]);
              this._tab._notselectedsinceload = !this._tab.selected;
            }
-@@ -9503,6 +9781,7 @@
+@@ -9684,6 +9962,7 @@
          // known defaults. Note we use the original URL since about:newtab
          // redirects to a prerendered page.
          const shouldRemoveFavicon =
@@ -1148,7 +1153,7 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
            !this._browser.mIconURL &&
            !ignoreBlank &&
            !(originalLocation.spec in FAVICON_DEFAULTS);
-@@ -9677,13 +9956,6 @@
+@@ -9858,13 +10137,6 @@
              this._browser.originalURI = aRequest.originalURI;
            }
  
@@ -1162,13 +1167,3 @@ index c42b1a1a8df6b38886c17f71ea88e5aaa7eebc80..c741404ed973ee3ac246fe246c0f645e
          }
  
          let userContextId = this._browser.getAttribute("usercontextid") || 0;
-@@ -10532,7 +10804,8 @@ var TabContextMenu = {
-     );
-     contextUnpinSelectedTabs.hidden =
-       !this.contextTab.pinned || !this.multiselected;
--
-+    gZenViewSplitter.updateContextMenuItems();
-+    gZenPinnedTabManager.updatePinnedTabContextMenu(this.contextTab);
-     // Build Ask Chat items
-     TabContextMenu.GenAI.buildTabMenu(
-       document.getElementById("context_askChat"),

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 e78fa0dec83424c0059c081f83fda0d23bdb5a94..a7de584d9029ff9e55d809d50377593e398ee999 100644
+index 237950fb2c449ce088c204d33a70b1d95dae549b..af200a043dcd2e24393fcefe32493e356c9f8c6f 100644
 --- a/browser/components/tabbrowser/content/tabgroup.js
 +++ b/browser/components/tabbrowser/content/tabgroup.js
 @@ -14,11 +14,11 @@
@@ -129,7 +129,7 @@ index e78fa0dec83424c0059c081f83fda0d23bdb5a94..a7de584d9029ff9e55d809d50377593e
      }
  
      get color() {
-@@ -335,6 +366,9 @@
+@@ -330,6 +361,9 @@
      }
  
      set collapsed(val) {
@@ -139,7 +139,7 @@ index e78fa0dec83424c0059c081f83fda0d23bdb5a94..a7de584d9029ff9e55d809d50377593e
        if (!!val == this.collapsed) {
          return;
        }
-@@ -421,7 +455,6 @@
+@@ -416,7 +450,6 @@
            tabGroupName,
          })
          .then(result => {
@@ -147,7 +147,7 @@ index e78fa0dec83424c0059c081f83fda0d23bdb5a94..a7de584d9029ff9e55d809d50377593e
          });
      }
  
-@@ -496,13 +529,68 @@
+@@ -491,13 +524,68 @@
       * @returns {MozTabbrowserTab[]}
       */
      get tabs() {
@@ -221,15 +221,17 @@ index e78fa0dec83424c0059c081f83fda0d23bdb5a94..a7de584d9029ff9e55d809d50377593e
      }
  
      /**
-@@ -610,7 +698,6 @@
-           );
+@@ -617,9 +705,6 @@
+           });
          } else {
            if (tabOrSplitView.pinned) {
--            tabOrSplitView.documentGlobal.gBrowser.unpinTab(tabOrSplitView);
+-            tabOrSplitView.documentGlobal.gBrowser.unpinTab(tabOrSplitView, {
+-              metricsContext,
+-            });
            }
            let tabToMove =
              this.documentGlobal === tabOrSplitView.documentGlobal
-@@ -679,7 +766,7 @@
+@@ -682,7 +767,7 @@
       */
      on_click(event) {
        let isToggleElement =
@@ -238,7 +240,7 @@ index e78fa0dec83424c0059c081f83fda0d23bdb5a94..a7de584d9029ff9e55d809d50377593e
          event.target === this.#overflowCountLabel;
        if (isToggleElement && event.button === 0) {
          event.preventDefault();
-@@ -758,5 +845,6 @@
+@@ -761,5 +846,6 @@
      }
    }
  

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

@@ -1,21 +0,0 @@
-diff --git a/browser/components/urlbar/UrlbarController.sys.mjs b/browser/components/urlbar/UrlbarController.sys.mjs
-index a05894d593e4149097c473822a38f87b2220625f..1660106c2a6548920fdffd2656e5a1f12c2d548b 100644
---- a/browser/components/urlbar/UrlbarController.sys.mjs
-+++ b/browser/components/urlbar/UrlbarController.sys.mjs
-@@ -305,7 +305,6 @@ export class UrlbarController {
-     const isMac = AppConstants.platform == "macosx";
-     // Handle readline/emacs-style navigation bindings on Mac.
-     if (
--      isMac &&
-       this.view.isOpen &&
-       event.ctrlKey &&
-       (event.key == "n" || event.key == "p")
-@@ -494,6 +493,8 @@ export class UrlbarController {
-             });
-           }
-           event.preventDefault();
-+        } else if (!this.input.value && !(event.ctrlKey || event.altKey || event.shiftKey)) {
-+          this.browserWindow.gZenUIManager.enableCommandsMode(event);
-         }
-         break;
-       }

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

@@ -1,14 +1,14 @@
 diff --git a/browser/components/urlbar/UrlbarMuxerStandard.sys.mjs b/browser/components/urlbar/UrlbarMuxerStandard.sys.mjs
-index 16041c10755adced9d665539796737a9f55712de..2232bdcc02e20dbb384ca0529a8bd8ce73dc6284 100644
+index 65bd41b2ea14c26d490632d4a5348d6cf33ee9dd..80fbd685156949b6c7e93ed9d0ef56350dd1a0fe 100644
 --- a/browser/components/urlbar/UrlbarMuxerStandard.sys.mjs
 +++ b/browser/components/urlbar/UrlbarMuxerStandard.sys.mjs
-@@ -837,11 +837,16 @@ class MuxerUnifiedComplete extends UrlbarMuxer {
+@@ -925,11 +925,16 @@ class MuxerUnifiedComplete extends UrlbarMuxer {
        result.providerName == "UrlbarProviderHeuristicFallback" &&
        state.context.heuristicResult?.providerName !=
          "UrlbarProviderHeuristicFallback"
 +      && !(
-+        result.type == UrlbarUtils.RESULT_TYPE.SEARCH &&
-+        state.context.heuristicResult?.type == UrlbarUtils.RESULT_TYPE.URL
++        result.type == lazy.UrlbarShared.RESULT_TYPE.SEARCH &&
++        state.context.heuristicResult?.type == lazy.UrlbarShared.RESULT_TYPE.URL
 +      )
      ) {
        return false;
@@ -19,11 +19,11 @@ index 16041c10755adced9d665539796737a9f55712de..2232bdcc02e20dbb384ca0529a8bd8ce
        // Discard the result if a tab-to-search result was added already.
        if (!state.canAddTabToSearch) {
          return false;
-@@ -1491,7 +1496,9 @@ class MuxerUnifiedComplete extends UrlbarMuxer {
+@@ -1593,7 +1598,9 @@ class MuxerUnifiedComplete extends UrlbarMuxer {
        usedLimits.maxResultCount++;
      }
  
-+    if (!(result.heuristic && result.source == UrlbarUtils.RESULT_SOURCE.ZEN_ACTIONS)) {
++    if (!(result.heuristic && result.source == lazy.UrlbarShared.RESULT_SOURCE.ZEN_ACTIONS)) {
      state.usedResultSpan += span;
 +    }
      this._updateStatePostAdd(result, state);

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 89f0d44d462de3d7d0f581d6371606f475443822..0d45ce5f6455e9c7276c54f504906bade5b3d286 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[]} */ ([
+@@ -163,6 +163,9 @@ 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.
+@@ -482,6 +485,7 @@ const PREF_URLBAR_DEFAULTS = /** @type {PreferenceDefinition[]} */ ([
    ["shortcuts.tabs", true],
    ["shortcuts.history", true],
    ["shortcuts.actions", true],
@@ -10,7 +20,7 @@ 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 }) {
+@@ -840,6 +844,8 @@ function makeDefaultResultGroups({
     */
    let rootGroup = {
      children: [

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

@@ -1,16 +1,16 @@
 diff --git a/browser/components/urlbar/UrlbarProvidersManager.sys.mjs b/browser/components/urlbar/UrlbarProvidersManager.sys.mjs
-index d2e2415e6b7c8833617dd1d4d01b16b110afbfa5..4a1e6e0940789b55144afd0566ecb91d88f7d590 100644
+index 67f51c7996c24549f39594c9a518bc5316350ce7..d66969f2411bb687c15448ad828b64ddf43c3389 100644
 --- a/browser/components/urlbar/UrlbarProvidersManager.sys.mjs
 +++ b/browser/components/urlbar/UrlbarProvidersManager.sys.mjs
 @@ -914,6 +914,7 @@ export class Query {
      if (
        result.heuristic &&
        this.context.searchMode &&
-+      !(this.context.searchMode.source === lazy.UrlbarUtils.RESULT_SOURCE.ZEN_ACTIONS && result.payload?.zenAction) &&
++      !(this.context.searchMode.source === lazy.UrlbarShared.RESULT_SOURCE.ZEN_ACTIONS && result.payload?.zenAction) &&
        (!this.context.trimmedSearchString ||
          (!this.context.searchMode.engineName && !result.autofill))
      ) {
-@@ -1044,6 +1045,7 @@ function updateSourcesIfEmpty(context) {
+@@ -1060,6 +1061,7 @@ function updateSourcesIfEmpty(context) {
              lazy.UrlbarShared.TOKEN_TYPE.RESTRICT_TITLE,
              lazy.UrlbarShared.TOKEN_TYPE.RESTRICT_URL,
              lazy.UrlbarShared.TOKEN_TYPE.RESTRICT_ACTION,
@@ -18,11 +18,11 @@ index d2e2415e6b7c8833617dd1d4d01b16b110afbfa5..4a1e6e0940789b55144afd0566ecb91d
            ].includes(t.type)
          );
  
-@@ -1103,6 +1105,14 @@ function updateSourcesIfEmpty(context) {
+@@ -1119,6 +1121,14 @@ function updateSourcesIfEmpty(context) {
            acceptedSources.push(source);
          }
          break;
-+      case lazy.UrlbarUtils.RESULT_SOURCE.WORKSPACES:
++      case lazy.UrlbarShared.RESULT_SOURCE.WORKSPACES:
 +        if (
 +          restrictTokenType === lazy.UrlbarShared.TOKEN_TYPE.RESTRICT_WORKSPACE ||
 +          !restrictTokenType
@@ -30,6 +30,6 @@ index d2e2415e6b7c8833617dd1d4d01b16b110afbfa5..4a1e6e0940789b55144afd0566ecb91d
 +          acceptedSources.push(source);
 +        }
 +        break;
-       case lazy.UrlbarUtils.RESULT_SOURCE.OTHER_LOCAL:
-       case lazy.UrlbarUtils.RESULT_SOURCE.ADDON:
+       case lazy.UrlbarShared.RESULT_SOURCE.OTHER_LOCAL:
+       case lazy.UrlbarShared.RESULT_SOURCE.ADDON:
        default:

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

@@ -1,8 +1,8 @@
 diff --git a/browser/components/urlbar/UrlbarUtils.sys.mjs b/browser/components/urlbar/UrlbarUtils.sys.mjs
-index aa7c67f2bfaa3f15d592a14b527a8721dfc9bc6f..d2fe012796ea3a5be05090a732011b3cf92b78be 100644
+index 78c76bde00b6b581184cee1cd0e1756e5f2da6a4..94c713470b1240729ef2350d090b0449f3801af4 100644
 --- a/browser/components/urlbar/UrlbarUtils.sys.mjs
 +++ b/browser/components/urlbar/UrlbarUtils.sys.mjs
-@@ -110,6 +110,8 @@ export var UrlbarUtils = {
+@@ -126,6 +126,8 @@ export var UrlbarUtils = {
      SEMANTIC_HISTORY: "semanticHistory",
      SUGGESTED_INDEX: "suggestedIndex",
      TAIL_SUGGESTION: "tailSuggestion",
@@ -11,22 +11,13 @@ index aa7c67f2bfaa3f15d592a14b527a8721dfc9bc6f..d2fe012796ea3a5be05090a732011b3c
    }),
  
    // Defines provider types.
-@@ -171,6 +173,8 @@ export var UrlbarUtils = {
-     OTHER_NETWORK: 6,
-     ADDON: 7,
-     ACTIONS: 8,
-+    ZEN_ACTIONS: 9,
-+    WORKSPACES: 10,
-   }),
- 
-   // Per-result exposure telemetry.
-@@ -320,6 +324,14 @@ export var UrlbarUtils = {
+@@ -274,6 +276,14 @@ export var UrlbarUtils = {
          telemetryLabel: "actions",
-         uiLabel: "urlbar-searchmode-actions2",
+         uiLabel: "urlbar-searchmode-actions3",
        },
 +      {
-+        source: this.RESULT_SOURCE.WORKSPACES,
-+        restrict: lazy.UrlbarShared.RESTRICT_TOKENS.WORKSPACE,
++        source: UrlbarShared.RESULT_SOURCE.WORKSPACES,
++        restrict: UrlbarShared.RESTRICT_TOKENS.WORKSPACE,
 +        icon: "chrome://browser/skin/zen-icons/selectable/layers.svg",
 +        pref: "shortcuts.workspaces",
 +        telemetryLabel: "workspaces",
@@ -35,12 +26,12 @@ index aa7c67f2bfaa3f15d592a14b527a8721dfc9bc6f..d2fe012796ea3a5be05090a732011b3c
      ]);
    },
  
-@@ -612,6 +624,12 @@ export var UrlbarUtils = {
+@@ -566,6 +576,12 @@ export var UrlbarUtils = {
            return this.RESULT_GROUP.HEURISTIC_FALLBACK;
          case "UrlbarProviderHistoryUrlHeuristic":
            return this.RESULT_GROUP.HEURISTIC_HISTORY_URL;
 +        case "ZenUrlbarProviderGlobalActions":
-+          if (result.source == this.RESULT_SOURCE.WORKSPACES) {
++          if (result.source == UrlbarShared.RESULT_SOURCE.WORKSPACES) {
 +            return this.RESULT_GROUP.ZEN_WORKSPACE;
 +          } else {
 +            return this.RESULT_GROUP.ZEN_ACTION;

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

@@ -0,0 +1,21 @@
+diff --git a/browser/components/urlbar/content/UrlbarChildController.mjs b/browser/components/urlbar/content/UrlbarChildController.mjs
+index a8e9d3093d046612650a17970330a8279f55833f..063a3e8adf009d6c0ddc60430bc0e7485e812b8a 100644
+--- a/browser/components/urlbar/content/UrlbarChildController.mjs
++++ b/browser/components/urlbar/content/UrlbarChildController.mjs
+@@ -258,7 +258,6 @@ export class UrlbarChildController {
+     const isMac = AppConstants.platform == "macosx";
+     // Handle readline/emacs-style navigation bindings on Mac.
+     if (
+-      isMac &&
+       this.view.isOpen &&
+       event.ctrlKey &&
+       (event.key == "n" || event.key == "p")
+@@ -450,6 +449,8 @@ export class UrlbarChildController {
+             });
+           }
+           event.preventDefault();
++        } else if (!this.input.value && !(event.ctrlKey || event.altKey || event.shiftKey)) {
++          this.window.gZenUIManager.enableCommandsMode(event);
+         }
+         break;
+       }

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

@@ -1,9 +1,9 @@
 diff --git a/browser/components/urlbar/content/UrlbarInput.mjs b/browser/components/urlbar/content/UrlbarInput.mjs
-index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1403a3630 100644
+index e7e9495e56076cd112beafb8297dece4ae4cea58..95e4333866a5f0d41fbdbe23910c396406a247e9 100644
 --- a/browser/components/urlbar/content/UrlbarInput.mjs
 +++ b/browser/components/urlbar/content/UrlbarInput.mjs
-@@ -98,6 +98,13 @@ const lazy = XPCOMUtils.declareLazy({
-   logger: () => lazy.UrlbarUtils.getLogger({ prefix: "Input" }),
+@@ -101,6 +101,13 @@ const lazy = XPCOMUtils.declareLazy({
+   logger: () => UrlbarShared.getLogger({ prefix: "Input" }),
  });
  
 +XPCOMUtils.defineLazyPreferenceGetter(
@@ -16,7 +16,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
  const UNLIMITED_MAX_RESULTS = 99;
  
  let getBoundsWithoutFlushing = element =>
-@@ -770,7 +777,16 @@ ${
+@@ -769,7 +776,16 @@ ${
      // See _on_select().  HTMLInputElement.select() dispatches a "select"
      // event but does not set the primary selection.
      this._suppressPrimaryAdjustment = true;
@@ -33,7 +33,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      this._suppressPrimaryAdjustment = false;
    }
  
-@@ -844,6 +860,10 @@ ${
+@@ -843,6 +859,10 @@ ${
      hideSearchTerms = false,
      isSameDocument = false,
    } = {}) {
@@ -44,7 +44,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      if (!this.#isAddressbar) {
        throw new Error(
          "Cannot set URI for UrlbarInput that is not an address bar"
-@@ -1138,7 +1158,16 @@ ${
+@@ -1137,7 +1157,16 @@ ${
        this.searchModeSwitcher?.updateSearchIcon();
      }
  
@@ -61,7 +61,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
    }
  
    /**
-@@ -1630,7 +1659,11 @@ ${
+@@ -1626,7 +1655,11 @@ ${
      openParams.avoidBrowserFocus = keepViewOpen;
  
      if (!this.#providesSearchMode(result) && !keepViewOpen) {
@@ -74,7 +74,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      }
  
      if (isCanonized) {
-@@ -2940,6 +2973,42 @@ ${
+@@ -2974,6 +3007,42 @@ ${
      await this.#updateLayoutBreakoutDimensions();
    }
  
@@ -117,7 +117,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
    startLayoutExtend() {
      if (!this.#allowBreakout || this.hasAttribute("breakout-extend")) {
        // Do not expand if the Urlbar does not support being expanded or it is
-@@ -2957,6 +3026,13 @@ ${
+@@ -2988,6 +3057,13 @@ ${
      this.toggleAttribute("breakout-extend", true);
      this.#updateTextboxPosition();
  
@@ -131,7 +131,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      // 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")) {
-@@ -2984,6 +3060,29 @@ ${
+@@ -3011,6 +3087,29 @@ ${
        return;
      }
  
@@ -161,7 +161,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      this.toggleAttribute("breakout-extend", false);
      this.#updateTextboxPosition();
    }
-@@ -3031,7 +3130,7 @@ ${
+@@ -3049,7 +3148,7 @@ ${
      forceUnifiedSearchButtonAvailable = false
    ) {
      let prevState = this.getAttribute("pageproxystate");
@@ -170,7 +170,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      this.setAttribute("pageproxystate", state);
      this._inputContainer.setAttribute("pageproxystate", state);
      this._identityBox?.setAttribute("pageproxystate", state);
-@@ -3314,10 +3413,12 @@ ${
+@@ -3332,10 +3431,12 @@ ${
      }
  
      this.style.top = px(
@@ -183,7 +183,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      );
    }
  
-@@ -3376,9 +3477,10 @@ ${
+@@ -3394,9 +3495,10 @@ ${
            return;
          }
  
@@ -195,7 +195,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
          );
          this.style.setProperty(
            "--urlbar-height",
-@@ -3883,6 +3985,7 @@ ${
+@@ -3902,6 +4004,7 @@ ${
    }
  
    _toggleActionOverride(event) {
@@ -203,7 +203,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      if (
        event.keyCode == KeyEvent.DOM_VK_SHIFT ||
        event.keyCode == KeyEvent.DOM_VK_ALT ||
-@@ -3995,8 +4098,8 @@ ${
+@@ -4014,8 +4117,8 @@ ${
      if (!this.#isAddressbar) {
        return val;
      }
@@ -214,7 +214,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
        : val;
      // Only trim value if the directionality doesn't change to RTL and we're not
      // showing a strikeout https protocol.
-@@ -4298,6 +4401,7 @@ ${
+@@ -4317,6 +4420,7 @@ ${
      browser = this.window.gBrowser.selectedBrowser,
      keepViewOpen = false
    ) {
@@ -222,7 +222,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      if (this.#isAddressbar) {
        this.#prepareAddressbarLoad(
          url,
-@@ -4411,6 +4515,10 @@ ${
+@@ -4430,6 +4534,10 @@ ${
        }
        reuseEmpty = true;
      }
@@ -233,7 +233,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      if (
        where == "tab" &&
        reuseEmpty &&
-@@ -4418,6 +4526,9 @@ ${
+@@ -4437,6 +4545,9 @@ ${
      ) {
        where = "current";
      }
@@ -243,7 +243,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      return where;
    }
  
-@@ -4672,6 +4783,7 @@ ${
+@@ -4691,6 +4802,7 @@ ${
        this.setResultForCurrentValue(null);
        this.handleCommand();
        this.controller.clearLastQueryContextCache();
@@ -251,7 +251,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
  
        this._suppressStartQuery = false;
      });
-@@ -4679,7 +4791,6 @@ ${
+@@ -4698,7 +4810,6 @@ ${
      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 +259,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
  
        let controller =
          this.document.commandDispatcher.getControllerForCommand("cmd_paste");
-@@ -4842,7 +4953,11 @@ ${
+@@ -4979,7 +5090,11 @@ ${
      if (!engineName && !source && !this.hasAttribute("searchmode")) {
        return;
      }
@@ -272,7 +272,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      if (this._searchModeIndicatorTitle) {
        this._searchModeIndicatorTitle.textContent = "";
        this._searchModeIndicatorTitle.removeAttribute("data-l10n-id");
-@@ -5159,6 +5274,7 @@ ${
+@@ -5297,6 +5412,7 @@ ${
  
      this.document.l10n.setAttributes(
        this.inputField,
@@ -280,7 +280,20 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
        l10nId,
        l10nId == "urlbar-placeholder-with-name"
          ? { name: engineName }
-@@ -5282,6 +5398,11 @@ ${
+@@ -5347,6 +5463,12 @@ ${
+     }
+ 
+     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
+@@ -5424,6 +5546,11 @@ ${
    }
  
    _on_click(event) {
@@ -292,10 +305,10 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
      switch (event.target) {
        case this.inputField:
        case this._inputContainer:
-@@ -5371,10 +5492,11 @@ ${
+@@ -5513,10 +5640,11 @@ ${
        }
        if (untrim) {
-         this._setValue(this._untrimmedValue);
+         this.setValue(this._untrimmedValue);
 +        this.setSelectionRange(0, this.value.length);
        }
      }
@@ -305,7 +318,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
        this.view.autoOpen({ event });
      } else {
        if (this._untrimOnFocusAfterKeydown) {
-@@ -5414,9 +5536,16 @@ ${
+@@ -5556,9 +5684,16 @@ ${
    }
  
    _on_mousedown(event) {
@@ -323,7 +336,7 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
          if (
            event.composedTarget != this.inputField &&
            event.composedTarget != this._inputContainer
-@@ -5426,6 +5555,10 @@ ${
+@@ -5568,6 +5703,10 @@ ${
  
          this.focusedViaMousedown = !this.focused;
          this.#preventClickSelectsAll = this.focused;
@@ -334,21 +347,21 @@ index 0b1b4b2f0f8d6b0fb126aa1224409ab6f1ffb8d8..4405e1bf385477c2161ae3a5a62e32c1
  
          // Keep the focus status, since the attribute may be changed
          // upon calling this.focus().
-@@ -5461,7 +5594,7 @@ ${
-         }
-         // Don't close the view when clicking on a tab; we may want to keep the
+@@ -5605,7 +5744,7 @@ ${
          // view open on tab switch, and the TabSelect event arrived earlier.
--        if (event.target.closest?.("tab")) {
-+        if (event.target.closest?.("tab") || event.target.closest?.("#tabs-newtab-button")) {
+         // Also ignore mousedown on the urlbarView context menu: opening/closing the
+         // view is already handled by the result opening flow.
+-        if (event.target.closest?.("tab, #urlbarView-context-menu")) {
++        if (event.target.closest?.("tab, #urlbarView-context-menu") || event.target.closest?.("#tabs-newtab-button")) {
            break;
          }
  
-@@ -5750,7 +5883,7 @@ ${
+@@ -5894,7 +6033,7 @@ ${
      // When we are in actions search mode we can show more results so
      // increase the limit.
      let maxResults =
--      this.searchMode?.source != lazy.UrlbarUtils.RESULT_SOURCE.ACTIONS
-+      this.searchMode?.source != lazy.UrlbarUtils.RESULT_SOURCE.ZEN_ACTIONS
+-      this.searchMode?.source != UrlbarShared.RESULT_SOURCE.ACTIONS
++      this.searchMode?.source != UrlbarShared.RESULT_SOURCE.ZEN_ACTIONS
          ? lazy.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 5522d8a8c8d9549453c1700ff6fec40be52747ce..7b8ad33cc337907249749074057254bf7e316994 100644
+index 5b45afb747bfcdbd06782186737669aa2c4c634d..f68bd009f70415b5fb513abdfe19b4427ceefbfc 100644
 --- a/browser/components/urlbar/content/UrlbarShared.mjs
 +++ b/browser/components/urlbar/content/UrlbarShared.mjs
-@@ -32,6 +32,7 @@ export const UrlbarShared = {
+@@ -47,6 +47,7 @@ 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,
@@ -10,19 +10,28 @@ index 5522d8a8c8d9549453c1700ff6fec40be52747ce..7b8ad33cc337907249749074057254bf
    }),
  
    /**
-@@ -52,6 +53,7 @@ export const UrlbarShared = {
+@@ -67,6 +68,7 @@ export const UrlbarShared = {
      TITLE: "#",
      URL: "$",
      ACTION: ">",
 +    WORKSPACE: "`",
    }),
  
+   // Defines UrlbarResult types.
+@@ -112,6 +114,8 @@ export const UrlbarShared = {
+     OTHER_NETWORK: 6,
+     ADDON: 7,
+     ACTIONS: 8,
++    ZEN_ACTIONS: 9,
++    WORKSPACES: 10,
+   }),
+ 
    /**
-@@ -68,6 +70,7 @@ export const UrlbarShared = {
+@@ -128,6 +132,7 @@ export const UrlbarShared = {
      if (lazy.UrlbarPrefs.get("scotchBonnet.enableOverride")) {
        keys.push(this.RESTRICT_TOKENS.ACTION);
      }
 +    keys.push(this.RESTRICT_TOKENS.WORKSPACE);
      return new Set(keys);
    },
- };
+ 

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 e465806c4ae4fc372d9aa2b71aa7f0e74c65d026..c0b3781901298bedee2736819a93edbf545507a7 100644
 --- a/browser/components/urlbar/content/UrlbarView.mjs
 +++ b/browser/components/urlbar/content/UrlbarView.mjs
-@@ -674,7 +674,7 @@ export class UrlbarView {
+@@ -803,7 +803,7 @@ 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 {
+@@ -941,10 +941,6 @@ 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 {
+@@ -3203,6 +3199,8 @@ 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 {
+@@ -3715,7 +3713,7 @@ export class UrlbarView {
    }
  
    #enableOrDisableRowWrap() {
@@ -40,3 +40,16 @@ index 8afb2bf4a757b3ef7902f5a6e6eed6b70ca2845e..440dea1e66540ca1998cb7464b6695ac
      this.#rows.toggleAttribute("wrap", wrap);
      this.oneOffSearchButtons?.container.toggleAttribute("wrap", wrap);
    }
+@@ -4144,6 +4142,12 @@ export class UrlbarView {
+   }
+ 
+   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.

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 5e5d39787674d1d5ac8c39edccb04f8b8993fbb8..6c8b483ad19d9b26232592c68a7f2a6887161057 100644
+index e735ec80b56e1a2da4bc5bec29136ce60353277b..330ea62d220d9acd96a95a605888839388e97452 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) {
+       @media (prefers-color-scheme: light) and (not -moz-pref("browser.nova.enabled")) {
 -        --urlbar-box-background-color: #fafafa;
        }
      }

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

@@ -1,8 +1,8 @@
 diff --git a/browser/themes/shared/tabbrowser/tabs.css b/browser/themes/shared/tabbrowser/tabs.css
-index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285062fbbcc 100644
+index 0820fa040642ee05c2a24f5d2cfa58da5c926647..2d93abcce1729744e5963f1c6ad47f253804576e 100644
 --- a/browser/themes/shared/tabbrowser/tabs.css
 +++ b/browser/themes/shared/tabbrowser/tabs.css
-@@ -33,7 +33,7 @@
+@@ -45,7 +45,7 @@
    --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 */
@@ -11,7 +11,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    --tab-collapsed-width: calc(var(--tab-collapsed-background-width) + 2 * var(--tab-inner-inline-margin));
    --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);
-@@ -282,7 +282,6 @@ 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 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    }
  
    &:is([selected], [multiselected]) {
-@@ -296,6 +295,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -309,6 +308,7 @@ tab-split-view-wrapper[dragtarget] {
      border-radius: inherit;
      position: relative;
      overflow: hidden;
@@ -27,7 +27,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
  
      &::before {
        position: absolute;
-@@ -493,10 +493,6 @@ tab-split-view-wrapper[dragtarget] {
+@@ -506,10 +506,6 @@ tab-split-view-wrapper[dragtarget] {
  
    @media -moz-pref("browser.tabs.fadeOutUnloadedTabs") {
      &[pending] {
@@ -38,7 +38,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
        opacity: 0.5;
        /* Fade the favicon out */
        transition-property: filter, opacity;
-@@ -512,10 +508,6 @@ tab-split-view-wrapper[dragtarget] {
+@@ -525,10 +521,6 @@ tab-split-view-wrapper[dragtarget] {
  
    @media -moz-pref("browser.tabs.fadeOutExplicitlyUnloadedTabs") {
      &[pending][discarded] {
@@ -49,7 +49,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
        opacity: 0.5;
        /* Fade the favicon out */
        transition-property: filter, opacity;
-@@ -589,7 +581,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -602,7 +594,7 @@ tab-split-view-wrapper[dragtarget] {
    }
  
    #tabbrowser-tabs[orient="vertical"] & {
@@ -58,7 +58,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    }
  
    &[crashed] {
-@@ -597,7 +589,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -610,7 +602,7 @@ tab-split-view-wrapper[dragtarget] {
    }
  
    #tabbrowser-tabs[orient="vertical"]:not([expanded]) &:not([crashed]),
@@ -67,7 +67,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
      &[soundplaying] {
        list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-playing-small.svg");
      }
-@@ -651,7 +643,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -664,7 +656,7 @@ tab-split-view-wrapper[dragtarget] {
      }
    }
  
@@ -76,7 +76,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    &[crashed] {
      display: revert;
    }
-@@ -811,7 +803,7 @@ tab-split-view-wrapper[dragtarget] {
+@@ -824,7 +816,7 @@ 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 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
        &:is([soundplaying], [muted], [activemedia-blocked]) {
          display: flex;
        }
-@@ -1031,7 +1023,6 @@ tab-split-view-wrapper[dragtarget] {
+@@ -1044,7 +1036,6 @@ 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 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    background-position: center bottom 6.5px;
    background-size: 4px 4px;
    background-repeat: no-repeat;
-@@ -1780,7 +1771,7 @@ tab-group {
+@@ -1797,7 +1788,7 @@ tab-group {
  }
  
  #tabbrowser-tabs[orient="vertical"][expanded] {
@@ -102,7 +102,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    &[movingtab][movingtab-addToGroup]:not([movingtab-group], [movingtab-ungroup]) .tabbrowser-tab:is(:active, [multiselected]) {
      margin-inline-start: var(--space-medium);
    }
-@@ -2335,7 +2326,7 @@ tab-group {
+@@ -2351,7 +2342,7 @@ tab-group {
    }
  }
  
@@ -111,7 +111,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
  #vertical-tabs-newtab-button {
    appearance: none;
    min-height: var(--tab-min-height);
-@@ -2346,7 +2337,7 @@ tab-group {
+@@ -2362,7 +2353,7 @@ tab-group {
    margin-inline: var(--tab-inner-inline-margin);
  
    #tabbrowser-tabs[orient="vertical"]:not([expanded]) & > .toolbarbutton-text {
@@ -120,16 +120,16 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    }
  
    &:hover {
-@@ -2370,7 +2361,7 @@ tab-group {
+@@ -2386,7 +2377,7 @@ 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.
   */
 -#tabbrowser-arrowscrollbox[orient="vertical"] > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button {
 +#tabbrowser-arrowscrollbox[orient="vertical"] #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button {
-   margin-block: var(--tab-block-margin);
+   margin-block: var(--tab-margin-block);
  }
  
-@@ -2560,7 +2551,6 @@ tab-group {
+@@ -2576,7 +2567,6 @@ tab-group {
  
    &:not([expanded]) {
      .tabbrowser-tab[pinned] {
@@ -137,7 +137,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
      }
  
      .tab-background {
-@@ -2599,8 +2589,8 @@ tab-group {
+@@ -2615,8 +2605,8 @@ tab-group {
        display: block;
        position: absolute;
        inset: auto;
@@ -148,7 +148,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
  
        &:-moz-window-inactive {
          background-image:
-@@ -2698,9 +2688,6 @@ tab-group {
+@@ -2714,9 +2704,6 @@ tab-group {
    ~ #tabbrowser-tabs[orient="horizontal"]::before {
      display: flex;
      content: "";
@@ -158,7 +158,7 @@ index 24ad9ab050a67d4a375eb1d05261a7f7c267d7d1..b2f2ae8e765ad1f052aa07ab1d47f285
    }
  }
  
-@@ -2733,7 +2720,6 @@ toolbar:not(#TabsToolbar) #firefox-view-button {
+@@ -2749,7 +2736,6 @@ toolbar:not(#TabsToolbar) #firefox-view-button {
    list-style-image: url(chrome://global/skin/icons/plus.svg);
  }
  

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

@@ -1,5 +1,5 @@
 diff --git a/browser/themes/shared/urlbar-searchbar.css b/browser/themes/shared/urlbar-searchbar.css
-index cc595de7e3839f7e688122552bca95f9f9ad3988..da4b1e1b5013d7a1a9af3d45d94db7194a1826f7 100644
+index 22d624d718a289dd7b84ffc2f04dd35893dfbe95..4f57f7853f3043e3ad01d893aa928b9d2e6f3c16 100644
 --- a/browser/themes/shared/urlbar-searchbar.css
 +++ b/browser/themes/shared/urlbar-searchbar.css
 @@ -19,8 +19,8 @@
@@ -13,7 +13,7 @@ index cc595de7e3839f7e688122552bca95f9f9ad3988..da4b1e1b5013d7a1a9af3d45d94db719
    }
    @media (max-width: 770px) {
      --urlbar-container-min-width: 240px;
-@@ -114,7 +114,7 @@ toolbar[inactive="true"] .urlbar,
+@@ -126,7 +126,7 @@ 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 {
@@ -22,18 +22,18 @@ index cc595de7e3839f7e688122552bca95f9f9ad3988..da4b1e1b5013d7a1a9af3d45d94db719
  }
  
  /* Document Picture-in-Picture API window */
-@@ -350,6 +350,10 @@ toolbar[inactive="true"] .urlbar,
+@@ -403,6 +403,10 @@ 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));
    }
- 
++
 +  #navigator-toolbox[zen-has-implicit-hover="true"] .urlbar:not([focused])[textoverflow="left"] > .urlbar-input-container > .urlbar-input-box > & {
 +    mask-image: linear-gradient(to right, transparent, black 3ch, black calc(100% - 3ch), transparent);
 +  }
-+
-   &::selection {
-     border-radius: var(--urlbar-selection-border-radius);
-   }
-@@ -464,10 +468,14 @@ toolbar[inactive="true"] .urlbar,
+ }
+ 
+ #urlbar-scheme {
+@@ -492,10 +496,14 @@ toolbar[inactive="true"] .urlbar,
  
    .urlbar[breakout][breakout-extend] {
      height: auto;
@@ -46,5 +46,5 @@ index cc595de7e3839f7e688122552bca95f9f9ad3988..da4b1e1b5013d7a1a9af3d45d94db719
      > .urlbar-input-container {
 +      align-items: center;
        height: var(--urlbar-container-height);
-       padding-block: calc((var(--urlbar-container-height) - var(--urlbar-height)) / 2 + var(--urlbar-input-container-padding));
+       padding-block: calc((var(--urlbar-container-height) - var(--urlbar-height)) / 2);
        padding-inline: calc(var(--urlbar-margin-inline) + var(--urlbar-input-container-padding));

src/browser/themes/shared/urlbar/view-proton-css.patch

@@ -1,18 +1,18 @@
 diff --git a/browser/themes/shared/urlbar/view-proton.css b/browser/themes/shared/urlbar/view-proton.css
-index 0b10c077a555e5d0fc488a3bb1b1b920f433204c..38e9d14e9838f2b8de6f654ff4e0700bb65506f0 100644
+index 3620b33cb11f2e6bba189cbaf7532cca0e97cd3b..346c318ed178fb77a217b3b992b94706db6bf0ee 100644
 --- a/browser/themes/shared/urlbar/view-proton.css
 +++ b/browser/themes/shared/urlbar/view-proton.css
-@@ -14,7 +14,7 @@
+@@ -12,7 +12,7 @@
  
    --urlbarView-small-font-size: 0.85em;
  
 -  --urlbarView-results-padding: 7px;
 +  --urlbarView-results-padding: 8px;
    --urlbarView-row-gutter: var(--space-xxsmall);
+   --urlbarview-row-padding-block: 6px;
    --urlbarView-row-padding-inline: var(--urlbar-icon-padding);
-   --urlbarView-row-padding-block: 6px;
-@@ -174,7 +174,6 @@
-       min-height: var(--urlbarView-row-min-height);
+@@ -165,7 +165,6 @@
+       min-height: var(--urlbarview-row-min-height);
      }
      :root[uidensity="touch"] & {
 -      padding-block: 11px;

src/dom/chrome-webidl/MediaController-webidl.patch

@@ -1,5 +1,5 @@
 diff --git a/dom/chrome-webidl/MediaController.webidl b/dom/chrome-webidl/MediaController.webidl
-index 790bc66a31253a861b21658e67c83796ae939298..0fb7e6cfbb1d1d35aeceb8d7b903cd86bf64403c 100644
+index 494ed7a424457dae822c86c0ef7f6d4e8685cd5e..a5a859cbdc76e0d79460780cfc41d7ed95e660e1 100644
 --- a/dom/chrome-webidl/MediaController.webidl
 +++ b/dom/chrome-webidl/MediaController.webidl
 @@ -23,6 +23,12 @@ enum MediaControlKey {
@@ -13,9 +13,9 @@ index 790bc66a31253a861b21658e67c83796ae939298..0fb7e6cfbb1d1d35aeceb8d7b903cd86
 +};
 +
  /**
-  * MediaController is used to control media playback for a tab, and each tab
-  * would only have one media controller, which can be accessed from the
-@@ -36,6 +42,7 @@ interface MediaController : EventTarget {
+  * The reason a chrome caller is pausing the controller. "user" preserves the
+  * existing user-initiated pause; the "system-*" values represent an
+@@ -49,6 +55,7 @@ interface MediaController : EventTarget {
    readonly attribute boolean isPlaying;
    readonly attribute boolean isAnyMediaBeingControlled;
    readonly attribute MediaSessionPlaybackState playbackState;
@@ -23,7 +23,7 @@ index 790bc66a31253a861b21658e67c83796ae939298..0fb7e6cfbb1d1d35aeceb8d7b903cd86
  
    // The effective audio-session type the tab is currently claiming. Chrome
    // consumers can use this to apply tab/application level audio-focus
-@@ -46,6 +53,9 @@ interface MediaController : EventTarget {
+@@ -59,6 +66,9 @@ interface MediaController : EventTarget {
    [Throws]
    MediaMetadataInit getMetadata();
  

src/dom/media/mediaelement/HTMLMediaElement-cpp.patch

@@ -1,16 +1,16 @@
 diff --git a/dom/media/mediaelement/HTMLMediaElement.cpp b/dom/media/mediaelement/HTMLMediaElement.cpp
-index b4ab1622d0e58781929aa6801dfd374f42567a7a..358f3d3cac3381ab9de3af65616095f69b9c7b23 100644
+index 912f2e08bd0d50e7ba012ed11b583127cf3e35e5..b60ec40f06f4e1a0f433eadebb1a18d40fd6d60f 100644
 --- a/dom/media/mediaelement/HTMLMediaElement.cpp
 +++ b/dom/media/mediaelement/HTMLMediaElement.cpp
-@@ -450,6 +450,7 @@ class HTMLMediaElement::MediaControlKeyListener final
-     // audible state. Therefore, in that case we would noitfy the audible state
-     // when media starts playing.
-     if (mState == MediaPlaybackState::ePlayed) {
+@@ -495,6 +495,7 @@ class HTMLMediaElement::MediaControlKeyListener final
+     // started, since they never reach the playing state.
+     if (mState == MediaPlaybackState::ePlayed ||
+         (IsStarted() && mControlType == ControlType::eUncontrollable)) {
 +      NotifyMediaPositionState();
-       NotifyAudibleStateChanged(mIsOwnerAudible
-                                     ? MediaAudibleState::eAudible
-                                     : MediaAudibleState::eInaudible);
-@@ -7450,6 +7451,9 @@ void HTMLMediaElement::FireTimeUpdate(TimeupdateType aType) {
+       NotifyAudibleStateChanged(newState);
+     }
+   }
+@@ -7738,6 +7739,9 @@ void HTMLMediaElement::FireTimeUpdate(TimeupdateType aType) {
      QueueTask(std::move(runner));
      mQueueTimeUpdateRunnerTime = TimeStamp::Now();
      mLastCurrentTime = CurrentTime();

src/external-patches/firefox/add_urlbar_closeonwindowblur_preference.patch

@@ -1,75 +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
-@@ -4783,10 +4783,16 @@
-     }
-   }
- 
-   _on_blur(event) {
-     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

@@ -1,167 +0,0 @@
-diff --git a/gfx/webrender_bindings/WebRenderAPI.cpp b/gfx/webrender_bindings/WebRenderAPI.cpp
---- a/gfx/webrender_bindings/WebRenderAPI.cpp
-+++ b/gfx/webrender_bindings/WebRenderAPI.cpp
-@@ -298,11 +298,13 @@
-                 panic_on_gl_error, picTileWidth, picTileHeight,
-                 gfx::gfxVars::WebRenderRequiresHardwareDriver(),
-                 StaticPrefs::gfx_webrender_low_quality_pinch_zoom_AtStartup(),
-                 StaticPrefs::gfx_webrender_max_shared_surface_size_AtStartup(),
-                 StaticPrefs::gfx_webrender_enable_subpixel_aa_AtStartup(),
--                compositor->ShouldUseLayerCompositor())) {
-+                compositor->ShouldUseLayerCompositor(),
-+                StaticPrefs::
-+                    gfx_webrender_opaque_backdrop_fallback_AtStartup())) {
-           // wr_window_new puts a message into gfxCriticalNote if it returns
-           // false
-           MOZ_ASSERT(errorMessage);
-           error.AssignASCII(errorMessage);
-           wr_api_free_error_msg(errorMessage);
-diff --git a/gfx/webrender_bindings/src/bindings.rs b/gfx/webrender_bindings/src/bindings.rs
---- a/gfx/webrender_bindings/src/bindings.rs
-+++ b/gfx/webrender_bindings/src/bindings.rs
-@@ -1998,10 +1998,11 @@
-     reject_software_rasterizer: bool,
-     low_quality_pinch_zoom: bool,
-     max_shared_surface_size: i32,
-     enable_subpixel_aa: bool,
-     use_layer_compositor: bool,
-+    opaque_backdrop_fallback: bool,
- ) -> bool {
-     assert!(unsafe { is_in_render_thread() });
- 
-     // Ensure the WR profiler callbacks are hooked up to the Gecko profiler.
-     set_profiler_hooks(Some(&PROFILER_HOOKS));
-@@ -2164,10 +2165,11 @@
-         texture_cache_config,
-         reject_software_rasterizer,
-         low_quality_pinch_zoom,
-         max_shared_surface_size,
-         enable_dithering,
-+        opaque_backdrop_fallback,
-         ..Default::default()
-     };
- 
-     let window_size = DeviceIntSize::new(window_width, window_height);
-     let notifier = Box::new(CppNotifier { window_id });
-diff --git a/gfx/wr/webrender/src/device/gl.rs b/gfx/wr/webrender/src/device/gl.rs
---- a/gfx/wr/webrender/src/device/gl.rs
-+++ b/gfx/wr/webrender/src/device/gl.rs
-@@ -3982,10 +3982,14 @@
- 
-     pub fn disable_color_write(&self) {
-         self.gl.color_mask(false, false, false, false);
-     }
- 
-+    pub fn set_color_mask(&self, r: bool, g: bool, b: bool, a: bool) {
-+        self.gl.color_mask(r, g, b, a);
-+    }
-+
-     pub fn set_blend(&mut self, enable: bool) {
-         if enable {
-             self.gl.enable(gl::BLEND);
-         } else {
-             self.gl.disable(gl::BLEND);
-diff --git a/gfx/wr/webrender/src/renderer/init.rs b/gfx/wr/webrender/src/renderer/init.rs
---- a/gfx/wr/webrender/src/renderer/init.rs
-+++ b/gfx/wr/webrender/src/renderer/init.rs
-@@ -204,6 +204,8 @@
-     pub low_quality_pinch_zoom: bool,
-     pub max_shared_surface_size: i32,
-     /// If true, open a debug socket to listen for remote debugger.
-     /// Relies on `debugger` cargo feature being enabled.
-     pub enable_debugger: bool,
-+    /// See explanation of `gfx.webrender.opaque-backdrop-fallback`.
-+    pub opaque_backdrop_fallback: bool,
- }
-@@ -277,9 +279,10 @@
-             enable_instancing: true,
-             reject_software_rasterizer: false,
-             low_quality_pinch_zoom: false,
-             max_shared_surface_size: 2048,
-             enable_debugger: true,
-+            opaque_backdrop_fallback: false,
-         }
-     }
- }
- 
-@@ -802,10 +805,11 @@
-         allocated_native_surfaces: FastHashSet::default(),
-         debug_overlay_state: DebugOverlayState::new(),
-         buffer_damage_tracker: BufferDamageTracker::default(),
-         max_primitive_instance_count,
-         enable_instancing: options.enable_instancing,
-+        opaque_backdrop_fallback: options.opaque_backdrop_fallback,
-         consecutive_oom_frames: 0,
-         target_frame_publish_id: None,
-         pending_result_msg: None,
-         layer_compositor_frame_state_in_prev_frame: None,
-         external_composite_debug_items: Vec::new(),
-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 @@
-     buffer_damage_tracker: BufferDamageTracker,
- 
-     max_primitive_instance_count: usize,
-     enable_instancing: bool,
- 
-+    opaque_backdrop_fallback: bool,
-+
-     /// Count consecutive oom frames to detectif we are stuck unable to render
-     /// in a loop.
-     consecutive_oom_frames: u32,
- 
-     /// update() defers processing of ResultMsg, if frame_publish_id of
-@@ -2787,18 +2789,29 @@
-                 let read_target = ReadTarget::from_texture(cache_texture);
- 
-                 // Should always be drawing to picture cache tiles or off-screen surface!
-                 debug_assert!(!draw_target.is_default());
-                 let device_to_framebuffer = Scale::new(1i32);
-+                let dest_fb_rect = dest * device_to_framebuffer;
- 
-                 self.device.blit_render_target(
-                     read_target,
-                     src * device_to_framebuffer,
-                     draw_target,
--                    dest * device_to_framebuffer,
-+                    dest_fb_rect,
-                     TextureFilter::Linear,
-                 );
-+
-+                if self.opaque_backdrop_fallback {
-+                    self.device.set_color_mask(false, false, false, true);
-+                    self.device.clear_target(
-+                        Some([0.0, 0.0, 0.0, 1.0]),
-+                        None,
-+                        Some(dest_fb_rect),
-+                    );
-+                    self.device.set_color_mask(true, true, true, true);
-+                }
-             }
-         }
-     }
- 
-     fn draw_picture_cache_target(
-diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
---- a/modules/libpref/init/StaticPrefList.yaml
-+++ b/modules/libpref/init/StaticPrefList.yaml
-@@ -8439,10 +8439,17 @@
- #else
-   value: false
- #endif
-   mirror: once
- 
-+# Make backdrop-filter treat its captured backdrop as if it had been
-+# composited over an opaque-black background. (See bug 2036640)
-+- name: gfx.webrender.opaque-backdrop-fallback
-+  type: bool
-+  value: true
-+  mirror: once
-+
- # Disable wait of GPU execution completion
- - name: gfx.webrender.wait-gpu-finished.disabled
-   type: bool
-   value: false
-   mirror: once
-

src/external-patches/firefox/bug_2011236.patch

@@ -0,0 +1,166 @@
+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()),
+@@ -59,9 +67,10 @@
+       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())) {
+   // 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/expose_tiled_attribute_to_all_platforms.patch

@@ -0,0 +1,72 @@
+diff --git a/widget/cocoa/nsCocoaWindow.mm b/widget/cocoa/nsCocoaWindow.mm
+--- a/widget/cocoa/nsCocoaWindow.mm
++++ b/widget/cocoa/nsCocoaWindow.mm
+@@ -70,10 +70,11 @@
+ #include "nsXULPopupManager.h"
+ 
+ #include "gfxPlatform.h"
+ #include "qcms.h"
+ 
++#import <objc/runtime.h>
+ #include <algorithm>
+ #include "mozilla/AutoRestore.h"
+ #include "mozilla/BasicEvents.h"
+ #include "mozilla/Maybe.h"
+ #include "mozilla/NativeKeyBindingsType.h"
+@@ -6948,10 +6949,31 @@
+     return nsSizeMode_Maximized;
+   }
+   return nsSizeMode_Normal;
+ }
+ 
++// The tiling state lives in a private NSWindow ivar "_tilingStateController"
++// (an _NSWMWindowTilingStateController). That controller's -tilingState returns
++// a non-nil _WMWindowTilingState only while the window is tiled by the system
++// window manager. None of this is public API, so it is all guarded and degrades
++// to false if the internals ever change.
++static bool WindowIsTiled(NSWindow* aWindow) {
++  if (!aWindow) {
++    return false;
++  }
++  static Ivar sControllerIvar =
++      class_getInstanceVariable([NSWindow class], "_tilingStateController");
++  if (!sControllerIvar) {
++    return false;
++  }
++  id controller = object_getIvar(aWindow, sControllerIvar);
++  if (![controller respondsToSelector:@selector(tilingState)]) {
++    return false;
++  }
++  return [controller performSelector:@selector(tilingState)] != nil;
++}
++
+ void nsCocoaWindow::ReportMoveEvent() {
+   NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
+ 
+   // Prevent recursion, which can become infinite (see bug 708278).  This
+   // can happen when the call to [NSWindow setFrameTopLeftPoint:] in
+@@ -6961,10 +6983,11 @@
+     return;
+   }
+   mInReportMoveEvent = true;
+ 
+   UpdateBounds();
++  SetIsTiled(WindowIsTiled(mWindow));
+ 
+   // The zoomed state can change when we're moving, in which case we need to
+   // update our internal mSizeMode. This can happen either if we're maximized
+   // and then moved, or if we're not maximized and moved back to zoomed state.
+   if (mWindow && (mSizeMode == nsSizeMode_Maximized) ^ mWindow.isZoomed) {
+@@ -7055,10 +7078,11 @@
+ 
+ void nsCocoaWindow::ReportSizeEvent() {
+   NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
+ 
+   UpdateBounds();
++  SetIsTiled(WindowIsTiled(mWindow));
+   LayoutDeviceIntRect innerBounds = GetClientBounds();
+   if (mWidgetListener) {
+     mWidgetListener->WindowResized(this, innerBounds.Size());
+   }
+   if (mAttachedWidgetListener) {
+

src/external-patches/firefox/gh-12979_clip_dirty_rect_to_device_size.patch

@@ -1,21 +0,0 @@
-diff --git a/gfx/wr/webrender/src/renderer/composite.rs b/gfx/wr/webrender/src/renderer/composite.rs
---- a/gfx/wr/webrender/src/renderer/composite.rs
-+++ b/gfx/wr/webrender/src/renderer/composite.rs
-@@ -974,12 +974,15 @@
-                     .iter()
-                     .chain(self.layer_compositor_frame_state_in_prev_frame.as_ref().unwrap().rects_without_id.iter())  {
-                     combined_dirty_rect = combined_dirty_rect.union(&rect);
-                 }
- 
-+                let device_rect = DeviceRect::from_size(device_size.to_f32());
-+                let clipped_dirty_rect = combined_dirty_rect.intersection_unchecked(&device_rect);
-+
-                 partial_present_mode = Some(PartialPresentMode::Single {
--                    dirty_rect: combined_dirty_rect,
-+                    dirty_rect: clipped_dirty_rect,
-                 });
-             } else {
-                 partial_present_mode = None;
-             }
- 
-

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/firefox/issue_14990.patch

@@ -0,0 +1,254 @@
+diff --git a/browser/components/sessionstore/SessionWriter.sys.mjs b/browser/components/sessionstore/SessionWriter.sys.mjs
+--- a/browser/components/sessionstore/SessionWriter.sys.mjs
++++ b/browser/components/sessionstore/SessionWriter.sys.mjs
+@@ -80,10 +80,14 @@
+       return await SessionWriterInternal.wipe();
+     } finally {
+       unlock();
+     }
+   },
++
++  get _jsonLengthHint() {
++    return SessionWriterInternal._lastJsonLength;
++  },
+ };
+ 
+ const SessionWriterInternal = {
+   // Path to the files used by the SessionWriter
+   Paths: null,
+@@ -104,10 +108,14 @@
+   /**
+    * Number of old upgrade backups that are being kept
+    */
+   maxUpgradeBackups: null,
+ 
++  // Estimated JSON string length from the previous write, used to pre-size
++  // the serialization buffer and avoid incremental reallocations.
++  _lastJsonLength: 0,
++
+   /**
+    * Initialize (or reinitialize) the writer.
+    *
+    * @param {string} origin Which of sessionstore.js or its backups
+    *   was used. One of the `STATE_*` constants defined above.
+@@ -201,48 +209,60 @@
+         }
+       }
+ 
+       let startWriteMs = Date.now();
+       let fileStat;
++      // Add 5% headroom to the hint so small growth between saves doesn't
++      // cause reallocs. The compressed-size-based estimate already has
++      // sufficient margin from the 4x multiplier.
++      let jsonLengthHint = Math.ceil(this._lastJsonLength * 1.05);
++
++      let uncompressedBytes;
+ 
+       if (options.isFinalWrite) {
+         // We are shutting down. At this stage, we know that
+         // $Paths.clean is either absent or corrupted. If it was
+         // originally present and valid, it has been moved to
+         // $Paths.cleanBackup a long time ago. We can therefore write
+         // with the guarantees that we erase no important data.
+-        await IOUtils.writeJSON(this.Paths.clean, state, {
++        uncompressedBytes = await IOUtils.writeJSON(this.Paths.clean, state, {
+           tmpPath: this.Paths.clean + ".tmp",
+           compress: true,
++          lengthHint: jsonLengthHint,
+         });
+         fileStat = await IOUtils.stat(this.Paths.clean);
+       } else if (this.state == STATE_RECOVERY) {
+         // At this stage, either $Paths.recovery was written >= 15
+         // seconds ago during this session or we have just started
+         // from $Paths.recovery left from the previous session. Either
+         // way, $Paths.recovery is good. We can move $Path.backup to
+         // $Path.recoveryBackup without erasing a good file with a bad
+         // file.
+-        await IOUtils.writeJSON(this.Paths.recovery, state, {
++        uncompressedBytes = await IOUtils.writeJSON(this.Paths.recovery, state, {
+           tmpPath: this.Paths.recovery + ".tmp",
+           backupFile: this.Paths.recoveryBackup,
+           compress: true,
++          lengthHint: jsonLengthHint,
+         });
+         fileStat = await IOUtils.stat(this.Paths.recovery);
+       } else {
+         // In other cases, either $Path.recovery is not necessary, or
+         // it doesn't exist or it has been corrupted. Regardless,
+         // don't backup $Path.recovery.
+-        await IOUtils.writeJSON(this.Paths.recovery, state, {
++        uncompressedBytes = await IOUtils.writeJSON(this.Paths.recovery, state, {
+           tmpPath: this.Paths.recovery + ".tmp",
+           compress: true,
++          lengthHint: jsonLengthHint,
+         });
+         fileStat = await IOUtils.stat(this.Paths.recovery);
+       }
+ 
+       telemetry.writeFileMs = Date.now() - startWriteMs;
+       telemetry.fileSizeBytes = fileStat.size;
++      // Use the actual pre-compression size from this write as the hint
++      // for the next write's buffer allocation.
++      this._lastJsonLength = uncompressedBytes.jsonLength;
+       lazy.sessionStoreLogger.debug(
+         `SessionWriter.write wrote ${telemetry.fileSizeBytes} bytes in ${telemetry.writeFileMs}ms`
+       );
+     } catch (ex) {
+       // Don't throw immediately
+@@ -375,10 +395,11 @@
+     } catch (ex) {
+       exn = exn || ex;
+     }
+ 
+     this.state = STATE_EMPTY;
++    this._lastJsonLength = 0;
+     if (exn) {
+       throw exn;
+     }
+ 
+     return { result: true };
+diff --git a/browser/components/sessionstore/test/unit/test_write_json_length_hint.js b/browser/components/sessionstore/test/unit/test_write_json_length_hint.js
+new file mode 100644
+--- /dev/null
++++ b/browser/components/sessionstore/test/unit/test_write_json_length_hint.js
+@@ -0,0 +1,73 @@
++/* Any copyright is dedicated to the Public Domain.
++   http://creativecommons.org/publicdomain/zero/1.0/ */
++
++"use strict";
++
++const { SessionWriter } = ChromeUtils.importESModule(
++  "resource:///modules/sessionstore/SessionWriter.sys.mjs"
++);
++
++const profd = do_get_profile();
++const { SessionFile } = ChromeUtils.importESModule(
++  "resource:///modules/sessionstore/SessionFile.sys.mjs"
++);
++
++const { updateAppInfo } = ChromeUtils.importESModule(
++  "resource://testing-common/AppInfo.sys.mjs"
++);
++updateAppInfo({
++  name: "SessionRestoreTest",
++  ID: "{230de50e-4cd1-11dc-8314-0800200c9a66}",
++  version: "1",
++  platformVersion: "",
++});
++
++add_setup(async function () {
++  let source = do_get_file("data/sessionstore_valid.js");
++  source.copyTo(profd, "sessionstore.js");
++  await writeCompressedFile(
++    SessionFile.Paths.clean.replace("jsonlz4", "js"),
++    SessionFile.Paths.clean
++  );
++  await SessionFile.read();
++});
++
++add_task(async function test_length_hint_updates_after_write() {
++  Assert.equal(
++    SessionWriter._jsonLengthHint,
++    0,
++    "Length hint starts at 0"
++  );
++
++  await SessionFile.write({});
++
++  let hintAfterSmall = SessionWriter._jsonLengthHint;
++  Assert.equal(
++    hintAfterSmall,
++    JSON.stringify({}).length,
++    "Hint matches the uncompressed JSON byte length"
++  );
++
++  let largerState = await IOUtils.readJSON(
++    PathUtils.join(do_get_cwd().path, "data", "sessionstore_complete.json")
++  );
++  await SessionFile.write(largerState);
++
++  Assert.greater(
++    SessionWriter._jsonLengthHint,
++    hintAfterSmall,
++    "Hint grows after writing a larger state"
++  );
++});
++
++add_task(async function test_length_hint_resets_on_wipe() {
++  await SessionFile.write({ windows: [{ tabs: [{ entries: [] }] }] });
++  Assert.greater(SessionWriter._jsonLengthHint, 0, "Hint is nonzero");
++
++  await SessionFile.wipe();
++  Assert.equal(
++    SessionWriter._jsonLengthHint,
++    0,
++    "Hint resets to 0 after wipe"
++  );
++});
+diff --git a/browser/components/sessionstore/test/unit/xpcshell.toml b/browser/components/sessionstore/test/unit/xpcshell.toml
+--- a/browser/components/sessionstore/test/unit/xpcshell.toml
++++ b/browser/components/sessionstore/test/unit/xpcshell.toml
+@@ -39,5 +39,10 @@
+ skip-if = [
+   "condprof", # Bug 1769154
+ ]
+ 
+ ["test_startup_session_async.js"]
++
++["test_write_json_length_hint.js"]
++support-files = [
++  "data/sessionstore_complete.json",
++]
+diff --git a/dom/chrome-webidl/IOUtils.webidl b/dom/chrome-webidl/IOUtils.webidl
+--- a/dom/chrome-webidl/IOUtils.webidl
++++ b/dom/chrome-webidl/IOUtils.webidl
+@@ -101,12 +101,12 @@
+    *
+    * @param path      An absolute file path
+    * @param value     The value to be serialized.
+    * @param options   Options for writing the file. The "append" mode is not supported.
+    *
+-   * @return Resolves with the number of bytes successfully written to the file,
+-   *         otherwise rejects with a DOMException.
++   * @return Resolves with the pre-compression size of the serialized JSON in
++   *         bytes (UTF-8), otherwise rejects with a DOMException.
+    */
+   [NewObject]
+   Promise<WriteJSONResult> writeJSON(DOMString path, any value, optional WriteJSONOptions options = {});
+   /**
+    * Moves the file from |sourcePath| to |destPath|, creating necessary parents.
+@@ -564,10 +564,16 @@
+   boolean flush = false;
+   /**
+    * If true, compress the data with LZ4-encoding before writing to the file.
+    */
+   boolean compress = false;
++  /**
++   * For |writeJSON|, a hint for the expected JSON string length in UTF-16 code
++   * units. When provided, the JSON serializer pre-allocates a buffer of this
++   * size to avoid incremental reallocations.
++   */
++  unsigned long long jsonLengthHint = 0;
+ };
+ 
+ /**
+  * Options to be passed to the |IOUtils.writeJSON| method.
+  */
+diff --git a/xpcom/ioutils/IOUtils.cpp b/xpcom/ioutils/IOUtils.cpp
+--- a/xpcom/ioutils/IOUtils.cpp
++++ b/xpcom/ioutils/IOUtils.cpp
+@@ -629,10 +629,13 @@
+         }
+ 
+         JSContext* cx = aGlobal.Context();
+         JS::Rooted<JS::Value> value(cx, aValue);
+         nsString string;
++        if (opts.mLengthHint) {
++          string.SetCapacity(opts.mLengthHint);
++        }
+         if (!JS_StringifyWithLengthHint(cx, &value, nullptr,
+                                         JS::NullHandleValue, AppendJSON,
+                                         &string, opts.mLengthHint)) {
+           JS::Rooted<JS::Value> exn(cx, JS::UndefinedValue());
+           if (JS_GetPendingException(cx, &exn)) {
+

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
@@ -37,7 +29,32 @@
   },
   {
     "type": "phabricator",
-    "id": "D291714",
-    "name": "gh-12979 Clip dirty_rect to device_size"
+    "id": "D312091",
+    "name": "Expose tiled attribute to all platforms"
+  },
+  {
+    "type": "phabricator",
+    "id": "D298708",
+    "name": "Issue 14990",
+    "replaces": {
+      "this._lastJsonLength = uncompressedBytes;": "this._lastJsonLength = uncompressedBytes.jsonLength;",
+      "          jsonLengthHint,": "          lengthHint: jsonLengthHint,"
+    }
+  },
+  {
+    "type": "phabricator",
+    "id": "D320897",
+    "name": "Bug 2011236",
+    "replaces": {
+      // The upstream patch context includes a MOZ_DIAGNOSTIC_ASSERT that
+      // doesn't exist yet in our Firefox version.
+      "@@ -59,11 +67,12 @@": "@@ -59,9 +67,10 @@",
+      "aLoadState->TypeHint())) {\n   MOZ_DIAGNOSTIC_ASSERT(!mURI->SchemeIs(\"javascript\"));\n \n   // Pull": "aLoadState->TypeHint())) {\n   // Pull"
+    }
+  },
+  {
+    "type": "phabricator",
+    "id": "D321446",
+    "name": "Issue 14710"
   }
 ]

src/gfx/layers/AnimationInfo-cpp.patch

@@ -1,16 +1,16 @@
 diff --git a/gfx/layers/AnimationInfo.cpp b/gfx/layers/AnimationInfo.cpp
-index b4941588bfbd94a337f2e848c659021723e1500d..8f91ca5b2fcca6ff04aa2c0af5ba26dd9fe7df0e 100644
+index 538808aa15d1902fc517f79e3a6d62f4d7fd9d37..4b0760b7be9d872a926f99716d16f3f64dcb2378 100644
 --- a/gfx/layers/AnimationInfo.cpp
 +++ b/gfx/layers/AnimationInfo.cpp
-@@ -14,6 +14,7 @@
- #include "mozilla/MotionPathUtils.h"
- #include "mozilla/PresShell.h"
- #include "mozilla/ScrollContainerFrame.h"
+@@ -18,6 +18,7 @@
+ #include "mozilla/layers/AnimationStorageData.h"
+ #include "mozilla/layers/CompositorThread.h"
+ #include "mozilla/layers/WebRenderLayerManager.h"
 +#include "mozilla/nsZenBoostsBackend.h"
  #include "nsIContent.h"
  #include "nsLayoutUtils.h"
  #include "nsRefreshDriver.h"
-@@ -341,9 +342,13 @@ static void SetAnimatable(NonCustomCSSPropertyId aProperty,
+@@ -367,9 +368,13 @@ static void SetAnimatable(NonCustomCSSPropertyId aProperty,
      case eCSSProperty_background_color: {
        // We don't support color animation on the compositor yet so that we can
        // resolve currentColor at this moment.

src/layout/generic/nsTextPaintStyle-cpp.patch

@@ -1,5 +1,5 @@
 diff --git a/layout/generic/nsTextPaintStyle.cpp b/layout/generic/nsTextPaintStyle.cpp
-index f741ab5eb83778ec2460a5d975757f09b3f2865e..f39a019c0d82db7ba9a122ce5269d0833ae04568 100644
+index 9dba72de611cd84ed07805f5ce40f882071240f0..782dea67f6d975ba5b7daa1e2e2ed862f7941952 100644
 --- a/layout/generic/nsTextPaintStyle.cpp
 +++ b/layout/generic/nsTextPaintStyle.cpp
 @@ -240,7 +240,7 @@ bool nsTextPaintStyle::GetTargetTextColor(nscolor* aForeColor) {
@@ -39,17 +39,14 @@ index f741ab5eb83778ec2460a5d975757f09b3f2865e..f39a019c0d82db7ba9a122ce5269d083
    return NS_GET_A(*aBackColor) != 0;
  }
  
-@@ -462,12 +463,12 @@ bool nsTextPaintStyle::InitSelectionColorsAndShadow() {
-     mSelectionPseudoStyle = std::move(style);
- 
-     if (nscolor bgColor = mSelectionPseudoStyle->GetVisitedDependentColor(
--            &nsStyleBackground::mBackgroundColor);
-+            &nsStyleBackground::mBackgroundColor, mFrame);
-         mSelectionPseudoStyle->HasAuthorSpecifiedTextColor() ||
-         NS_GET_A(bgColor) > 0) {
-       mSelectionBGColor = bgColor;
+@@ -463,9 +464,9 @@ bool nsTextPaintStyle::InitSelectionColorsAndShadow() {
+     if (mSelectionPseudoStyle->HasAuthorSpecifiedTextColor() ||
+         mSelectionPseudoStyle->HasAuthorSpecifiedBorderOrBackground()) {
+       mSelectionBGColor = mSelectionPseudoStyle->GetVisitedDependentColor(
+-          &nsStyleBackground::mBackgroundColor);
 -      mSelectionTextColor =
 -          mSelectionPseudoStyle->GetVisitedDependentColor(&nsStyleText::mColor);
++          &nsStyleBackground::mBackgroundColor, mFrame);
 +      mSelectionTextColor = mSelectionPseudoStyle->GetVisitedDependentColor(
 +          &nsStyleText::mColor, mFrame);
        return true;

src/layout/svg/SVGImageContext-cpp.patch

@@ -1,5 +1,5 @@
 diff --git a/layout/svg/SVGImageContext.cpp b/layout/svg/SVGImageContext.cpp
-index 384401ae2cb80a1bf438b1fb3d849254de100210..e5ef332bc529e6588c33b507993880ca9def51d1 100644
+index 4d43db157aa9447105eeb5459cad74de6cef01d6..327d8e4f7e21783824616800fa821218c8c848e8 100644
 --- a/layout/svg/SVGImageContext.cpp
 +++ b/layout/svg/SVGImageContext.cpp
 @@ -10,6 +10,7 @@
@@ -39,20 +39,17 @@ index 384401ae2cb80a1bf438b1fb3d849254de100210..e5ef332bc529e6588c33b507993880ca
    const nsStyleSVG* style = aStyle.StyleSVG();
    if (!style->ExposesContextProperties()) {
      // Content must have '-moz-context-properties' set to the names of the
-@@ -64,12 +80,14 @@ void SVGImageContext::MaybeStoreContextPaint(SVGImageContext& aContext,
+@@ -62,11 +78,11 @@ void SVGImageContext::MaybeStoreContextPaint(SVGImageContext& aContext,
+ 
    if ((style->mMozContextProperties.bits & StyleContextPropertyBits::FILL) &&
        style->mFill.kind.IsColor()) {
-     haveContextPaint = true;
--    contextPaint->SetFill(style->mFill.kind.AsColor().CalcColor(aStyle));
-+    contextPaint->SetFill(
-+        style->mFill.kind.AsColor().CalcColor(aStyle, nullptr));
+-    fill = Some(style->mFill.kind.AsColor().CalcColor(aStyle));
++    fill = Some(style->mFill.kind.AsColor().CalcColor(aStyle, nullptr));
    }
    if ((style->mMozContextProperties.bits & StyleContextPropertyBits::STROKE) &&
        style->mStroke.kind.IsColor()) {
-     haveContextPaint = true;
--    contextPaint->SetStroke(style->mStroke.kind.AsColor().CalcColor(aStyle));
-+    contextPaint->SetStroke(
-+        style->mStroke.kind.AsColor().CalcColor(aStyle, nullptr));
+-    stroke = Some(style->mStroke.kind.AsColor().CalcColor(aStyle));
++    stroke = Some(style->mStroke.kind.AsColor().CalcColor(aStyle, nullptr));
    }
-   if (style->mMozContextProperties.bits &
-       StyleContextPropertyBits::FILL_OPACITY) {
+   if ((style->mMozContextProperties.bits &
+        StyleContextPropertyBits::FILL_OPACITY) &&

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

@@ -1,15 +0,0 @@
-diff --git a/services/sync/modules/service.sys.mjs b/services/sync/modules/service.sys.mjs
-index 4f4efe572909441abdd81909282936702c225621..81ab06a9414ed656b644a21b40b683f06a4f8dbf 100644
---- a/services/sync/modules/service.sys.mjs
-+++ b/services/sync/modules/service.sys.mjs
-@@ -99,6 +99,10 @@ function getEngineModules() {
-     whenTrue: "ExtensionStorageEngineKinto",
-     whenFalse: "ExtensionStorageEngineBridge",
-   };
-+  result.Spaces = {
-+    module: "resource:///modules/zen/ZenWorkspacesSync.sys.mjs",
-+    symbol: "ZenWorkspacesEngine",
-+  };
-   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/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/content/widgets/tabbox-js.patch

@@ -1,5 +1,5 @@
 diff --git a/toolkit/content/widgets/tabbox.js b/toolkit/content/widgets/tabbox.js
-index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b577e10a46 100644
+index 402fe6a74b5327a30199667de18f053ad75fe910..9bcbc827d18db2f996d964f7c7e3439e064c9e0d 100644
 --- a/toolkit/content/widgets/tabbox.js
 +++ b/toolkit/content/widgets/tabbox.js
 @@ -11,6 +11,23 @@
@@ -26,7 +26,7 @@ index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b5
    let imports = {};
    ChromeUtils.defineESModuleGetters(imports, {
      DeferredTask: "resource://gre/modules/DeferredTask.sys.mjs",
-@@ -225,7 +242,7 @@
+@@ -226,7 +243,7 @@
      ) {
        this._inAsyncOperation = false;
        if (oldPanel != this._selectedPanel) {
@@ -35,7 +35,7 @@ index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b5
          this._selectedPanel?.classList.add("deck-selected");
        }
        this.setAttribute("selectedIndex", val);
-@@ -924,7 +941,7 @@
+@@ -898,7 +915,7 @@
        if (!tab) {
          return;
        }
@@ -44,7 +44,7 @@ index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b5
          if (otherTab != tab && otherTab.selected) {
            otherTab._selected = false;
          }
-@@ -960,6 +977,7 @@
+@@ -934,6 +951,7 @@
       * @param {MozTab|null} [val]
       */
      set selectedItem(val) {
@@ -52,7 +52,7 @@ index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b5
        if (val && !val.selected) {
          // The selectedIndex setter ignores invalid values
          // such as -1 if |val| isn't one of our child nodes.
-@@ -1137,7 +1155,7 @@
+@@ -1111,7 +1129,7 @@
          if (tab == startTab) {
            return null;
          }
@@ -61,10 +61,10 @@ index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b5
            return tab;
          }
        }
-@@ -1199,13 +1217,30 @@
-      * @param {boolean} [aWrap]
+@@ -1175,13 +1193,30 @@
       */
-     advanceSelectedTab(aDir, aWrap) {
+     // eslint-disable-next-line no-unused-vars
+     advanceSelectedTab(aDir, aWrap, aEvent) {
 +      if (window?.gZenGlanceManager?._animating) return;
        let { ariaFocusedItem } = this;
        let startTab = ariaFocusedItem;
@@ -93,7 +93,7 @@ index 9334120e818b609c6cb6792fd509e90c9b362551..2dde0c8698eb75bac0d0eb4d800d11b5
        // Handle keyboard navigation for a hidden tab that can be selected, like the Firefox View tab,
        // which has a random placement in this.allTabs.
        if (startTab.hidden) {
-@@ -1218,7 +1253,7 @@
+@@ -1194,7 +1229,7 @@
          newTab = this.findNextTab(startTab, {
            direction: aDir,
            wrap: aWrap,

src/toolkit/modules/JSONFile-sys-mjs.patch

@@ -1,5 +1,5 @@
 diff --git a/toolkit/modules/JSONFile.sys.mjs b/toolkit/modules/JSONFile.sys.mjs
-index 397991e4af8f49b6365d729fc11267b5c1113400..9b1d6fd3850b239000a3c4d2a2d5799a0989f4e3 100644
+index 397991e4af8f49b6365d729fc11267b5c1113400..599ed16981aa1f1e9abfee2ad6c1883efd88e0ba 100644
 --- a/toolkit/modules/JSONFile.sys.mjs
 +++ b/toolkit/modules/JSONFile.sys.mjs
 @@ -132,6 +132,7 @@ export function JSONFile(config) {
@@ -16,14 +16,14 @@ index 397991e4af8f49b6365d729fc11267b5c1113400..9b1d6fd3850b239000a3c4d2a2d5799a
      try {
 -      await IOUtils.writeJSON(
 +      if (this._useSizeHints && this._lastSavedSize) {
-+        this._options.jsonLengthHint = Math.ceil(this._lastSavedSize * 1.05);
++        this._options.lengthHint = Math.ceil(this._lastSavedSize * 1.05);
 +      }
 +      const result = await IOUtils.writeJSON(
          this.path,
          this._data,
          Object.assign({ tmpPath: this.path + ".tmp" }, this._options)
        );
-+      this._lastSavedSize = this._useSizeHints ? result : null;
++      this._lastSavedSize = this._useSizeHints ? result.jsonLength : null;
      } catch (ex) {
        if (typeof this._data.toJSONSafe == "function") {
          // If serialization fails, try fallback safe JSON converter.

src/toolkit/themes/shared/menulist-css.patch

@@ -1,13 +1,13 @@
 diff --git a/toolkit/themes/shared/menulist.css b/toolkit/themes/shared/menulist.css
-index 3b3e855f20c74f096324c42814e63cbdeb486051..f52e47fc8acea20a4e073b7f4a588d4d4e721aa8 100644
+index d763691ab48424aebd1f5152c8b60011445f2244..984b39f8a21c9460d316f8c0b77003a279aa2b6e 100644
 --- a/toolkit/themes/shared/menulist.css
 +++ b/toolkit/themes/shared/menulist.css
-@@ -53,7 +53,7 @@
+@@ -55,7 +55,7 @@
  
  :host(:not([native])) {
    appearance: none;
--  background-color: var(--button-background-color);
+-  background-color: var(--select-background-color);
 +  background-color: light-dark(rgba(0,0,0,.1), rgba(255,255,255,.1));
-   color: var(--button-text-color);
-   border-radius: var(--button-border-radius);
-   padding-block: var(--space-xsmall);
+   color: var(--select-text-color);
+   border: var(--select-border);
+   border-radius: var(--select-border-radius);

src/toolkit/xre/nsXREDirProvider-cpp.patch

@@ -1,8 +1,8 @@
 diff --git a/toolkit/xre/nsXREDirProvider.cpp b/toolkit/xre/nsXREDirProvider.cpp
-index b54980f967ab8fe9b9c13bbad8fae6323ec84f1f..f1a5481fb3bd44c1f8f6e40f4163aa7842623325 100644
+index dcce3335e14f9f5d3c0b9fe6a86527be6011c143..ca788d6bd1db3a14d80bf571813e9c706456968f 100644
 --- a/toolkit/xre/nsXREDirProvider.cpp
 +++ b/toolkit/xre/nsXREDirProvider.cpp
-@@ -1333,9 +1333,11 @@ nsresult nsXREDirProvider::AppendFromAppData(nsIFile* aFile, bool aIsDotted) {
+@@ -1335,14 +1335,10 @@ nsresult nsXREDirProvider::AppendFromAppData(nsIFile* aFile, bool aIsDotted) {
    // Similar to nsXREDirProvider::AppendProfilePath.
    // TODO: Bug 1990407 - Evaluate if refactoring might be required there in the
    // future?
@@ -10,12 +10,17 @@ index b54980f967ab8fe9b9c13bbad8fae6323ec84f1f..f1a5481fb3bd44c1f8f6e40f4163aa78
 +  // Use aIsDotted for a different purpose here, will probably break in the future
 +  if (gAppData->profile && aIsDotted) {
      nsAutoCString profile;
-     profile = gAppData->profile;
+-#  if defined(MOZ_THUNDERBIRD)
+-    if (gAppData->profile[0] != '.') {
+-      profile.Assign('.');
+-    }
+-#  endif
+-    profile.Append(gAppData->profile);
 +    profile = "."_ns + nsDependentCString(gAppData->profile);
      MOZ_TRY(aFile->AppendRelativeNativePath(profile));
    } else {
      nsAutoCString vendor;
-@@ -1345,8 +1347,6 @@ nsresult nsXREDirProvider::AppendFromAppData(nsIFile* aFile, bool aIsDotted) {
+@@ -1352,8 +1348,6 @@ nsresult nsXREDirProvider::AppendFromAppData(nsIFile* aFile, bool aIsDotted) {
      ToLowerCase(vendor);
      ToLowerCase(appName);
  
@@ -24,11 +29,16 @@ index b54980f967ab8fe9b9c13bbad8fae6323ec84f1f..f1a5481fb3bd44c1f8f6e40f4163aa78
      MOZ_TRY(aFile->AppendRelativeNativePath(appName));
    }
  
-@@ -1514,13 +1514,8 @@ nsresult nsXREDirProvider::GetLegacyOrXDGHomePath(const char* aHomeDir,
- 
-     // If the build was made against a specific profile name, MOZ_APP_PROFILE=
-     // then make sure we respect this and dont move to XDG directory
--    if (gAppData->profile) {
+@@ -1530,18 +1524,8 @@ nsresult nsXREDirProvider::GetLegacyOrXDGHomePath(const char* aHomeDir,
+     // of a specific build where legacy needs to be forced, similar to the
+     // Firefox handling. Both casing are verified to account for systems where
+     // that matters.
+-    if (gAppData->profile
+-#  if defined(MOZ_THUNDERBIRD)
+-        && strcmp(gAppData->profile, "thunderbird") != 0 &&
+-        strcmp(gAppData->profile, "Thunderbird") != 0
+-#  endif
+-    ) {
 -      MOZ_TRY(NS_NewNativeLocalFile(nsDependentCString(aHomeDir),
 -                                    getter_AddRefs(localDir)));
 -    } else {

src/widget/SwipeTracker-cpp.patch

@@ -1,15 +1,15 @@
 diff --git a/widget/SwipeTracker.cpp b/widget/SwipeTracker.cpp
-index 887d06d3bd9cdaa934880e0ae7a11ec8b737fb61..979f93ddab0d661ac1a1d73e7a0ba27fa2c8f9b7 100644
+index 83b80a808261ce28e5c571dc802993556477f0c8..8de39d5c724e23f540a70f47e893e46bcf1112e6 100644
 --- a/widget/SwipeTracker.cpp
 +++ b/widget/SwipeTracker.cpp
-@@ -3,6 +3,7 @@
-  * You can obtain one at http://mozilla.org/MPL/2.0/. */
- 
- #include "SwipeTracker.h"
+@@ -10,6 +10,7 @@
+ #include "mozilla/PresShell.h"
+ #include "mozilla/StaticPrefs_browser.h"
+ #include "mozilla/StaticPrefs_widget.h"
 +#include "mozilla/StaticPrefs_zen.h"
- 
- #include "InputData.h"
- #include "mozilla/FlushType.h"
+ #include "mozilla/TimeStamp.h"
+ #include "mozilla/TouchEvents.h"
+ #include "mozilla/dom/SimpleGestureEventBinding.h"
 @@ -67,6 +68,9 @@ double SwipeTracker::SwipeSuccessTargetValue() const {
  }
  

src/widget/Theme-cpp.patch

@@ -1,16 +1,16 @@
 diff --git a/widget/Theme.cpp b/widget/Theme.cpp
-index 766a8ca4bc6fcc98f719ad4f472b20bc1d198ac9..be4419cfafb55e5cac8f5de741185ee3cabc4722 100644
+index 0d9c9014dabfe7177c25d6f983ff823c4435a327..7995de05ed556fa6373b83e3e44bffc1b857dd73 100644
 --- a/widget/Theme.cpp
 +++ b/widget/Theme.cpp
-@@ -18,6 +18,7 @@
- #include "mozilla/RelativeLuminanceUtils.h"
- #include "mozilla/ScrollContainerFrame.h"
- #include "mozilla/StaticPrefs_widget.h"
+@@ -25,6 +25,7 @@
+ #include "mozilla/gfx/Filters.h"
+ #include "mozilla/gfx/Rect.h"
+ #include "mozilla/gfx/Types.h"
 +#include "mozilla/nsZenBoostsBackend.h"
  #include "mozilla/webrender/WebRenderAPI.h"
  #include "nsCSSColorUtils.h"
  #include "nsCSSRendering.h"
-@@ -670,10 +671,15 @@ template <typename PaintBackendData>
+@@ -671,10 +672,15 @@ template <typename PaintBackendData>
  void Theme::PaintTextField(PaintBackendData& aPaintData,
                             const LayoutDeviceRect& aRect,
                             const ElementState& aState, const Colors& aColors,
@@ -27,7 +27,7 @@ index 766a8ca4bc6fcc98f719ad4f472b20bc1d198ac9..be4419cfafb55e5cac8f5de741185ee3
    const CSSCoord radius = 2.0f;
  
    ThemeDrawing::PaintRoundedRectWithRadius(aPaintData, aRect, backgroundColor,
-@@ -690,9 +696,9 @@ template <typename PaintBackendData>
+@@ -691,9 +697,9 @@ template <typename PaintBackendData>
  void Theme::PaintListbox(PaintBackendData& aPaintData,
                           const LayoutDeviceRect& aRect,
                           const ElementState& aState, const Colors& aColors,
@@ -39,7 +39,7 @@ index 766a8ca4bc6fcc98f719ad4f472b20bc1d198ac9..be4419cfafb55e5cac8f5de741185ee3
  }
  
  template <typename PaintBackendData>
-@@ -1158,10 +1164,12 @@ bool Theme::DoDrawWidgetBackground(PaintBackendData& aPaintData,
+@@ -1159,10 +1165,12 @@ bool Theme::DoDrawWidgetBackground(PaintBackendData& aPaintData,
      case StyleAppearance::Textfield:
      case StyleAppearance::NumberInput:
      case StyleAppearance::PasswordInput:

src/widget/cocoa/VibrancyManager-mm.patch

@@ -1,16 +1,16 @@
 diff --git a/widget/cocoa/VibrancyManager.mm b/widget/cocoa/VibrancyManager.mm
-index 5df70a63afb235d2db11712276bb63f756222a0f..a2865aa2748433cbfd956ae46d197200fbbcfadd 100644
+index bc62ff28285691c605fe0680e7a98927f11d5882..c209b63179df298e9b43182813ba0045f08328cc 100644
 --- a/widget/cocoa/VibrancyManager.mm
 +++ b/widget/cocoa/VibrancyManager.mm
-@@ -11,6 +11,7 @@
+@@ -9,6 +9,7 @@
+ #import <objc/message.h>
  
- #include "nsCocoaWindow.h"
  #include "mozilla/StaticPrefs_widget.h"
 +#include "mozilla/StaticPrefs_zen.h"
+ #include "nsCocoaWindow.h"
  
  using namespace mozilla;
- 
-@@ -29,6 +30,9 @@ static NSVisualEffectState VisualEffectStateForVibrancyType(
+@@ -28,6 +29,9 @@ static NSVisualEffectState VisualEffectStateForVibrancyType(
      case VibrancyType::Sidebar:
        break;
    }
@@ -20,44 +20,3 @@ index 5df70a63afb235d2db11712276bb63f756222a0f..a2865aa2748433cbfd956ae46d197200
    return NSVisualEffectStateFollowsWindowActiveState;
  }
  
-@@ -36,7 +40,23 @@ static NSVisualEffectMaterial VisualEffectMaterialForVibrancyType(
-     VibrancyType aType) {
-   switch (aType) {
-     case VibrancyType::Sidebar:
--      return NSVisualEffectMaterialSidebar;
-+      switch (StaticPrefs::zen_widget_macos_window_material()) {
-+        case 1:
-+          return NSVisualEffectMaterialHUDWindow;
-+        case 2:
-+          return NSVisualEffectMaterialFullScreenUI;
-+        case 3:
-+          return NSVisualEffectMaterialPopover;
-+        case 4:
-+          return NSVisualEffectMaterialMenu;
-+        case 5:
-+          return NSVisualEffectMaterialToolTip;
-+        case 6:
-+          return NSVisualEffectMaterialHeaderView;
-+        case 7:
-+        default:
-+          return NSVisualEffectMaterialUnderWindowBackground;
-+      }
-     case VibrancyType::Titlebar:
-       return NSVisualEffectMaterialTitlebar;
-   }
-@@ -76,6 +96,7 @@ - (NSView*)hitTest:(NSPoint)aPoint {
- 
- - (void)prefChanged {
-   self.blendingMode = VisualEffectBlendingModeForVibrancyType(mType);
-+  self.material = VisualEffectMaterialForVibrancyType(mType);
- }
- @end
- 
-@@ -86,6 +107,7 @@ static void PrefChanged(const char* aPref, void* aClosure) {
- static constexpr nsLiteralCString kObservedPrefs[] = {
-     "widget.macos.sidebar-blend-mode.behind-window"_ns,
-     "widget.macos.titlebar-blend-mode.behind-window"_ns,
-+    "zen.widget.macos.window-material"_ns,
- };
- 
- VibrancyManager::VibrancyManager(const nsCocoaWindow& aCoordinateConverter,

src/widget/cocoa/nsCocoaWindow-h.patch

@@ -0,0 +1,23 @@
+diff --git a/widget/cocoa/nsCocoaWindow.h b/widget/cocoa/nsCocoaWindow.h
+index 312011c1c2ac41e78affecbdef25d72766a7c882..e5865c7d6259f0a3df48edf7a26b1b75a23cdb3a 100644
+--- a/widget/cocoa/nsCocoaWindow.h
++++ b/widget/cocoa/nsCocoaWindow.h
+@@ -462,6 +462,10 @@ class nsCocoaWindow final : public nsIWidget {
+   void SetHideTitlebarSeparator(bool) override;
+   bool IsMacTitlebarDirectionRTL() override;
+   void SetCustomTitlebar(bool) override;
++  void SetWindowClass(const nsAString& aXulWinType,
++                      const nsAString& aXulWinClass,
++                      const nsAString& aXulWinName) override;
++  void UpdateWindowMaterial();
+   void UpdateThemeGeometries(
+       const nsTArray<ThemeGeometry>& aThemeGeometries) override;
+   void LockAspectRatio(bool aShouldLock) override;
+@@ -672,6 +676,7 @@ class nsCocoaWindow final : public nsIWidget {
+   bool mAspectRatioLocked = false;
+   bool mIsAlert = false;  // True if this is an non-native alert window.
+   bool mWasShown = false;
++  bool mIsBrowserWindow = false;
+ 
+   int32_t mNumModalDescendants = 0;
+ 

src/widget/cocoa/nsCocoaWindow-mm.patch

@@ -0,0 +1,134 @@
+diff --git a/widget/cocoa/nsCocoaWindow.mm b/widget/cocoa/nsCocoaWindow.mm
+index 2efd02e4a92433fd29bbfdb707aa81cfec45031e..3b763c3927f07e529c826f8e4f62bc80a324b247 100644
+--- a/widget/cocoa/nsCocoaWindow.mm
++++ b/widget/cocoa/nsCocoaWindow.mm
+@@ -86,6 +86,7 @@
+ #include "mozilla/StaticPrefs_gfx.h"
+ #include "mozilla/StaticPrefs_ui.h"
+ #include "mozilla/StaticPrefs_widget.h"
++#include "mozilla/StaticPrefs_zen.h"
+ #include "mozilla/WritingModes.h"
+ #include "mozilla/dom/Document.h"
+ #include "mozilla/layers/CompositorBridgeChild.h"
+@@ -1332,6 +1333,110 @@ - (NSRect)_opaqueRectForWindowMoveWhenInTitlebar {
+ }
+ @end
+ 
++@interface ZenWindowMaterialView : NSVisualEffectView
++- (void)prefChanged;
++@end
++
++static void ZenWindowMaterialPrefChanged(const char* aPref, void* aClosure) {
++  [static_cast<ZenWindowMaterialView*>(aClosure) prefChanged];
++}
++
++static constexpr nsLiteralCString kZenWindowMaterialPrefs[] = {
++    "zen.widget.macos.window-material"_ns,
++    "zen.view.grey-out-inactive-windows"_ns,
++};
++
++static NSVisualEffectMaterial ZenWindowMaterial() {
++  switch (StaticPrefs::zen_widget_macos_window_material()) {
++    case 1:
++      return NSVisualEffectMaterialHUDWindow;
++    case 2:
++      return NSVisualEffectMaterialFullScreenUI;
++    case 3:
++      return NSVisualEffectMaterialPopover;
++    case 4:
++      return NSVisualEffectMaterialMenu;
++    case 5:
++      return NSVisualEffectMaterialToolTip;
++    case 6:
++      return NSVisualEffectMaterialHeaderView;
++    case 7:
++    default:
++      return NSVisualEffectMaterialUnderWindowBackground;
++  }
++}
++
++@implementation ZenWindowMaterialView
++- (instancetype)initWithFrame:(NSRect)aRect {
++  self = [super initWithFrame:aRect];
++  self.appearance = nil;
++  self.emphasized = NO;
++  self.blendingMode = NSVisualEffectBlendingModeBehindWindow;
++  [self prefChanged];
++  for (const auto& pref : kZenWindowMaterialPrefs) {
++    Preferences::RegisterCallback(ZenWindowMaterialPrefChanged, pref, self);
++  }
++  return self;
++}
++
++- (void)dealloc {
++  for (const auto& pref : kZenWindowMaterialPrefs) {
++    Preferences::UnregisterCallback(ZenWindowMaterialPrefChanged, pref, self);
++  }
++  [super dealloc];
++}
++
++- (void)prefChanged {
++  self.state = StaticPrefs::zen_view_grey_out_inactive_windows()
++                   ? NSVisualEffectStateFollowsWindowActiveState
++                   : NSVisualEffectStateActive;
++  self.material = ZenWindowMaterial();
++}
++@end
++
++static void ZenWindowVibrancyPrefChanged(const char* aPref, void* aClosure) {
++  static_cast<nsCocoaWindow*>(aClosure)->UpdateWindowMaterial();
++}
++
++void nsCocoaWindow::SetWindowClass(const nsAString& aXulWinType,
++                                   const nsAString& aXulWinClass,
++                                   const nsAString& aXulWinName) {
++  if (mWindowType != WindowType::TopLevel || mIsBrowserWindow ||
++      !aXulWinType.EqualsLiteral("navigator:browser")) {
++    return;
++  }
++  mIsBrowserWindow = true;
++  Preferences::RegisterCallback(ZenWindowVibrancyPrefChanged,
++                                "zen.widget.macos.window-vibrancy", this);
++  UpdateWindowMaterial();
++}
++
++void nsCocoaWindow::UpdateWindowMaterial() {
++  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
++
++  if (!mWindow) {
++    return;
++  }
++  bool wanted = StaticPrefs::zen_widget_macos_window_vibrancy();
++  if (wanted ==
++      [mWindow.contentView isKindOfClass:[ZenWindowMaterialView class]]) {
++    return;
++  }
++
++  NSRect frame = mWindow.contentView.frame;
++  NSView* wrapper = wanted ? [[ZenWindowMaterialView alloc] initWithFrame:frame]
++                           : [[NSView alloc] initWithFrame:frame];
++  wrapper.wantsLayer = YES;
++  for (NSView* view in [mWindow contentViewContents]) {
++    [view removeFromSuperviewWithoutNeedingDisplay];
++    [wrapper addSubview:view];
++  }
++  mWindow.contentView = wrapper;
++  [wrapper release];
++
++  NS_OBJC_END_TRY_IGNORE_BLOCK;
++}
++
+ void nsCocoaWindow::UpdateWindowDraggingRegion(
+     const LayoutDeviceIntRegion& aRegion) {
+   // mChildView returns YES from mouseDownCanMoveWindow, so we need to put
+@@ -4919,6 +5024,10 @@ - (BOOL)wantsBestResolutionOpenGLSurface {
+ nsCocoaWindow::~nsCocoaWindow() {
+   NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
+ 
++  if (mIsBrowserWindow) {
++    Preferences::UnregisterCallback(ZenWindowVibrancyPrefChanged,
++                                    "zen.widget.macos.window-vibrancy", this);
++  }
+   RemoveAllChildren();
+   if (mWindow && mWindowMadeHere) {
+     CancelAllTransitions();

src/widget/cocoa/nsDragService-mm.patch

@@ -1,16 +1,16 @@
 diff --git a/widget/cocoa/nsDragService.mm b/widget/cocoa/nsDragService.mm
-index 81fe6f749c1d046141003ad2413605b4d4acf9ed..f26c2556657ad683dad3fa712feca5965343175d 100644
+index 340a9ad81c5cb23bb7e5f927d11d5cffdde7ce70..32fc707ccfa56fa8c307860868d092c4a9050419 100644
 --- a/widget/cocoa/nsDragService.mm
 +++ b/widget/cocoa/nsDragService.mm
-@@ -22,6 +22,7 @@
- #include "mozilla/PresShell.h"
+@@ -10,6 +10,7 @@
  #include "mozilla/dom/Document.h"
  #include "mozilla/dom/DocumentInlines.h"
-+#include "mozilla/nsZenDragAndDrop.h"
- #include "nsIContent.h"
- #include "nsCocoaUtils.h"
  #include "mozilla/gfx/2D.h"
-@@ -146,6 +147,10 @@
++#include "mozilla/nsZenDragAndDrop.h"
+ #include "nsArrayUtils.h"
+ #include "nsCOMPtr.h"
+ #include "nsClipboard.h"
+@@ -145,6 +146,10 @@
                                              bitsPerPixel:32];
  
    uint8_t* dest = [imageRep bitmapData];
@@ -21,7 +21,7 @@ index 81fe6f749c1d046141003ad2413605b4d4acf9ed..f26c2556657ad683dad3fa712feca596
    for (uint32_t i = 0; i < height; ++i) {
      uint8_t* src = map.mData + i * map.mStride;
      for (uint32_t j = 0; j < width; ++j) {
-@@ -153,15 +158,15 @@
+@@ -152,15 +157,15 @@
        // is premultipled here. Also, Quartz likes RGBA, so do that translation
        // as well.
  #ifdef IS_BIG_ENDIAN

src/zen/boosts/ZenBoostStyles.sys.mjs

@@ -81,15 +81,8 @@ export class nsZenBoostStyles {
     }
 
     if (fontCase != "" || fontFamily != "") {
-      const ignoredElements = [
-        ".google-symbols",
-        "gf-load-icon-font",
-        "mat-icon",
-        ".google-material-icons",
-        "span",
-      ];
       style += `/* Text Format */\n`;
-      style += `body *:not(${ignoredElements.join(",")}) {\n`;
+      style += `body *:not(.google-symbols, gf-load-icon-font, mat-icon, .google-material-icons) {\n`;
       style += `${fontFamily}\n`;
       style += `${fontCase}\n`;
       style += `}\n`;

src/zen/common/modules/ZenSidebarNotification.mjs

@@ -22,27 +22,64 @@ class ZenSidebarNotification extends MozLitElement {
   static properties = {
     headingL10nId: { type: String, fluent: true },
     links: { type: Array },
+    autoHideMs: { type: Number },
   };
 
-  constructor({ headingL10nId = "", links = [] } = {}) {
+  #autoHideAnimation = null;
+
+  constructor({ headingL10nId = "", links = [], autoHideMs = 0 } = {}) {
     super();
     this.headingL10nId = headingL10nId;
     this.links = links;
+    this.autoHideMs = autoHideMs;
+    // Hold the countdown while the user is reading.
+    this.addEventListener("mouseenter", () => this.#autoHideAnimation?.pause());
+    this.addEventListener("mouseleave", () => this.#autoHideAnimation?.play());
   }
 
   connectedCallback() {
     super.connectedCallback();
     if (this.parentElement) {
-      this.#animateIn();
+      this.#animateIn().then(() => this.#startAutoHide());
     }
   }
 
   remove() {
+    if (this.#autoHideAnimation?.playState !== "finished") {
+      // Stop a running countdown; a finished one must keep its fill so
+      // the bar doesn't snap back to full during the fade-out.
+      this.#autoHideAnimation?.cancel();
+    }
+    this.#autoHideAnimation = null;
     this.#animateOut().then(() => {
       super.remove();
     });
   }
 
+  async #startAutoHide() {
+    if (!this.autoHideMs || !this.isConnected) {
+      return;
+    }
+    await this.updateComplete;
+    const bar = this.shadowRoot?.querySelector(
+      ".zen-sidebar-notification-progress-bar"
+    );
+    if (!bar || this.#autoHideAnimation) {
+      return;
+    }
+    this.#autoHideAnimation = bar.animate(
+      { transform: ["scaleX(1)", "scaleX(0)"] },
+      { duration: this.autoHideMs, easing: "linear", fill: "forwards" }
+    );
+    this.#autoHideAnimation.finished.then(
+      () => this.remove(),
+      () => {}
+    );
+    if (this.matches(":hover")) {
+      this.#autoHideAnimation.pause();
+    }
+  }
+
   render() {
     return html`
       <link
@@ -62,6 +99,15 @@ class ZenSidebarNotification extends MozLitElement {
           <img src="chrome://browser/skin/zen-icons/close.svg" />
         </div>
       </div>
+      ${
+        this.autoHideMs
+          ? html`
+              <div class="zen-sidebar-notification-progress">
+                <div class="zen-sidebar-notification-progress-bar"></div>
+              </div>
+            `
+          : null
+      }
       <div class="zen-sidebar-notification-body">
         ${this.links.map(
           link => html`

src/zen/common/modules/ZenUIManager.mjs

@@ -4,6 +4,7 @@
 
 import { nsZenMultiWindowFeature } from "chrome://browser/content/zen-components/ZenCommonUtils.mjs";
 import { nsZenMenuBar } from "chrome://browser/content/zen-components/ZenMenubar.mjs";
+import { UrlbarShared } from "chrome://browser/content/urlbar/UrlbarShared.mjs";
 
 window.gZenUIManager = {
   _popupTrackingElements: [],
@@ -467,7 +468,7 @@ window.gZenUIManager = {
     let searchMode = null;
     if (!currentSearchMode) {
       searchMode = {
-        source: UrlbarUtils.RESULT_SOURCE.ZEN_ACTIONS,
+        source: UrlbarShared.RESULT_SOURCE.ZEN_ACTIONS,
         isPreview: true,
       };
     }

src/zen/common/modules/ZenUpdates.mjs

@@ -7,6 +7,7 @@ import createSidebarNotification from "chrome://browser/content/zen-components/Z
 const ZEN_UPDATE_PREF = "zen.updates.last-version";
 const ZEN_BUILD_ID_PREF = "zen.updates.last-build-id";
 const ZEN_UPDATE_SHOW = "zen.updates.show-update-notification";
+const ZEN_UPDATE_NOTIFICATION_TIMEOUT_MS = 15000;
 
 export default function checkForZenUpdates() {
   const version = Services.appinfo.version;
@@ -25,6 +26,7 @@ export default function checkForZenUpdates() {
   );
   createSidebarNotification({
     headingL10nId: "zen-sidebar-notification-updated-heading",
+    autoHideMs: ZEN_UPDATE_NOTIFICATION_TIMEOUT_MS,
     links: [
       {
         url: Services.urlFormatter.formatURL(

src/zen/common/styles/zen-browser-ui.css

@@ -113,15 +113,6 @@ body,
 }
 
 #zen-browser-background {
-  /* This is conceptually a background, but putting this on a pseudo-element
-    * avoids it from suppressing the chrome-content separator border, etc.
-    *
-    * See bugzilla's 1949528 and bug 1476281 (which would make this unnecessary). */
-  @media (-moz-platform: macos) {
-    -moz-default-appearance: -moz-sidebar;
-    appearance: auto;
-  }
-
   /*
    *  Important: We set the color to `AccentColor` so we can
    *  Compute the stylings and get the native accent color.

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

@@ -642,7 +642,7 @@
 
 .urlbarView-row {
   --urlbarView-row-padding-inline: 8px;
-  --urlbarView-row-padding-block: 10px;
+  --urlbarview-row-padding-block: 10px;
   color: light-dark(rgba(0, 0, 0, 0.7), rgba(255, 255, 255, 0.7)) !important;
 
   &:hover {

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

@@ -77,6 +77,18 @@
   }
 }
 
+.zen-sidebar-notification-progress {
+  height: 2px;
+  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));
+    transform-origin: left center;
+  }
+}
+
 .zen-sidebar-notification-body {
   padding: 6px;
   display: flex;

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

@@ -46,8 +46,8 @@
   min-height: 30px;
 }
 
-/* Firefox View */
 #firefox-view-button,
+#ai-window-toggle,
 #wrapper-firefox-view-button {
   display: none !important;
 }

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

@@ -253,7 +253,7 @@
   --zen-active-tab-scale: 0.985;
 
   /* Define tab hover background color */
-  --tab-hover-background-color: var(--toolbarbutton-hover-background);
+  --tab-background-color-hover: var(--toolbarbutton-hover-background);
 
   /* Sidebar Notifications */
   --zen-sidebar-notification-bg: color-mix(

src/zen/common/sys/ZenActorsManager.sys.mjs

@@ -29,6 +29,7 @@ let JSWINDOWACTORS = {
         DOMContentLoaded: {},
       },
     },
+    safeForUntrustedWebProcess: true,
     matches: [
       ...Services.prefs.getStringPref("zen.injections.match-urls").split(","),
       "about:preferences",
@@ -55,6 +56,7 @@ let JSWINDOWACTORS = {
     },
     allFrames: true,
     remoteTypes: ["web", "file"],
+    safeForUntrustedWebProcess: true,
     enablePreference: "zen.glance.enabled",
   },
   ZenWindowDrag: {
@@ -71,6 +73,7 @@ let JSWINDOWACTORS = {
     },
     messageManagerGroups: ["browsers"],
     remoteTypes: ["web", "file"],
+    safeForUntrustedWebProcess: true,
     enablePreference: "zen.view.drag-window-from-content",
   },
 };
@@ -88,6 +91,7 @@ if (!Services.appinfo.inSafeMode) {
         DOMWindowCreated: {},
       },
     },
+    safeForUntrustedWebProcess: true,
     allFrames: true,
     remoteTypes: ["web", "file"],
     enablePreference: "zen.boosts.enabled",

src/zen/common/sys/ZenUIMigration.sys.mjs

@@ -12,7 +12,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
 
 class nsZenUIMigration {
   PREF_NAME = "zen.ui.migration.version";
-  MIGRATION_VERSION = 6;
+  MIGRATION_VERSION = 7;
 
   init(isNewProfile) {
     if (!isNewProfile) {
@@ -150,6 +150,20 @@ class nsZenUIMigration {
       }, 1000);
     });
   }
+
+  _migrateV7() {
+    if (
+      AppConstants.platform === "macosx" &&
+      Services.prefs.prefHasUserValue(
+        "widget.macos.sidebar-blend-mode.behind-window"
+      ) &&
+      !Services.prefs.getBoolPref(
+        "widget.macos.sidebar-blend-mode.behind-window"
+      )
+    ) {
+      Services.prefs.setBoolPref("zen.widget.macos.window-vibrancy", false);
+    }
+  }
 }
 
 export var gZenUIMigration = new nsZenUIMigration();