Merge pull request #7771 from zen-browser/containerized-essentials

Containerized essentials
2026-03-06 08:47:03 +00:00 · 2025-04-22 14:11:46 +02:00
parent c153bef170 3fbe8c0b6c
commit 5f7c3a41f1
34 changed files with 55118 additions and 642 deletions
--- a/babel.config.json
+++ b/babel.config.json
@@ -0,0 +1,3 @@
+{
+  "presets": ["@babel/preset-typescript"]
+}
--- a/build/ts/transform-ts.js
+++ b/build/ts/transform-ts.js
@@ -0,0 +1,10 @@
+const fs = require('fs');
+const MJS_FILES = ['src/zen/split-view/ZenViewSplitter.ts'];
+
+for (const file of MJS_FILES) {
+  const code = fs.readFileSync(file, 'utf8');
+  require('@babel/core').transformSync(code, {
+    presets: ['@babel/preset-typescript'],
+    filename: file,
+  });
+}
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
        "@zen-browser/surfer": "^1.11.7"
      },
      "devDependencies": {
+        "@babel/preset-typescript": "^7.27.0",
        "formal-git": "^1.1.5",
        "husky": "^9.1.7",
        "lint-staged": "^15.3.0",
@@ -19,6 +20,533 @@
        "prettier-plugin-sh": "^0.14.0"
      }
    },
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+        "picocolors": "^1.0.0"
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+      "integrity": "sha512-2ncevenBqXI6qRMukPlXwHKHchC7RyMuu4xv5JBXRfOGVcTy1mXCD12qrp7Jsoxll1EV3+9sE4GugBVRjT2jFA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/code-frame": "^7.26.2",
+        "@babel/parser": "^7.27.0",
+        "@babel/types": "^7.27.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/traverse": {
+      "version": "7.27.0",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.27.0.tgz",
+      "integrity": "sha512-19lYZFzYVQkkHkl4Cy4WrAVcqBkgvV2YM2TU3xG6DIwO7O3ecbDPfW3yM3bjAGcqcQHi+CCtjMR3dIEHxsd6bA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/code-frame": "^7.26.2",
+        "@babel/generator": "^7.27.0",
+        "@babel/parser": "^7.27.0",
+        "@babel/template": "^7.27.0",
+        "@babel/types": "^7.27.0",
+        "debug": "^4.3.1",
+        "globals": "^11.1.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/types": {
+      "version": "7.27.0",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.27.0.tgz",
+      "integrity": "sha512-H45s8fVLYjbhFH62dIJ3WtmJ6RSPt/3DRO0ZcT2SUiYiQyz3BLVb9ADEnLl91m74aQPS3AzzeajZHYOalWe3bg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/helper-string-parser": "^7.25.9",
+        "@babel/helper-validator-identifier": "^7.25.9"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@jridgewell/gen-mapping": {
+      "version": "0.3.8",
+      "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.8.tgz",
+      "integrity": "sha512-imAbBGkb+ebQyxKgzv5Hu2nmROxoDOXHh80evxdoXNOrvAnVx7zimzc1Oo5h9RlfV4vPXaE2iM5pOFbvOCClWA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/set-array": "^1.2.1",
+        "@jridgewell/sourcemap-codec": "^1.4.10",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/set-array": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/@jridgewell/set-array/-/set-array-1.2.1.tgz",
+      "integrity": "sha512-R8gLRTZeyp03ymzP/6Lil/28tGeGEzhx1q2k703KGWRAI1VdvPIXdG70VJc2pAMw3NA6JKL5hhFu1sJX0Mnn/A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.25",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.25.tgz",
+      "integrity": "sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.1.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14"
+      }
+    },
    "node_modules/@oozcitak/dom": {
      "version": "1.15.10",
      "resolved": "https://registry.npmjs.org/@oozcitak/dom/-/dom-1.15.10.tgz",
@@ -497,6 +1025,40 @@
        "node": ">=8"
      }
    },
+    "node_modules/browserslist": {
+      "version": "4.24.4",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.24.4.tgz",
+      "integrity": "sha512-KDi1Ny1gSePi1vm0q4oxSF8b4DR44GF4BbmS2YdhPLOEqd8pDviZOGH/GsmRwoWJ2+5Lr085X7naowMwKHDG1A==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/browserslist"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/browserslist"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "caniuse-lite": "^1.0.30001688",
+        "electron-to-chromium": "^1.5.73",
+        "node-releases": "^2.0.19",
+        "update-browserslist-db": "^1.1.1"
+      },
+      "bin": {
+        "browserslist": "cli.js"
+      },
+      "engines": {
+        "node": "^6 || ^7 || ^8 || ^9 || ^10 || ^11 || ^12 || >=13.7"
+      }
+    },
    "node_modules/buffer": {
      "version": "5.7.1",
      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
@@ -558,6 +1120,28 @@
        "node": ">=0.8"
      }
    },
+    "node_modules/caniuse-lite": {
+      "version": "1.0.30001715",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001715.tgz",
+      "integrity": "sha512-7ptkFGMm2OAOgvZpwgA4yjQ5SQbrNVGdRjzH0pBdy1Fasvcr+KAeECmbCAECzTuDuoX0FCY8KzUxjf9+9kfZEw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/browserslist"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/caniuse-lite"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "CC-BY-4.0",
+      "peer": true
+    },
    "node_modules/chalk": {
      "version": "4.1.2",
      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
@@ -719,6 +1303,14 @@
        "node": ">= 0.6"
      }
    },
+    "node_modules/convert-source-map": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
+      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
    "node_modules/core-js-pure": {
      "version": "3.41.0",
      "resolved": "https://registry.npmjs.org/core-js-pure/-/core-js-pure-3.41.0.tgz",
@@ -827,6 +1419,14 @@
        "node": ">= 6"
      }
    },
+    "node_modules/electron-to-chromium": {
+      "version": "1.5.139",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.139.tgz",
+      "integrity": "sha512-GGnRYOTdN5LYpwbIr0rwP/ZHOQSvAF6TG0LSzp28uCBb9JiXHJGmaaKw29qjNJc5bGnnp6kXJqRnGMQoELwi5w==",
+      "dev": true,
+      "license": "ISC",
+      "peer": true
+    },
    "node_modules/emoji-regex": {
      "version": "8.0.0",
      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -855,6 +1455,17 @@
        "url": "https://github.com/sponsors/sindresorhus"
      }
    },
+    "node_modules/escalade": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.2.0.tgz",
+      "integrity": "sha512-WUj2qlxaQtO4g6Pq5c29GTcWGDyd8itL8zTlipgECz3JesAiiOKotd8JU6otB3PACgG6xkJUyVhboMS+bje/jA==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
    "node_modules/esprima": {
      "version": "4.0.1",
      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
@@ -1060,6 +1671,17 @@
        "node": ">=12"
      }
    },
+    "node_modules/gensync": {
+      "version": "1.0.0-beta.2",
+      "resolved": "https://registry.npmjs.org/gensync/-/gensync-1.0.0-beta.2.tgz",
+      "integrity": "sha512-3hN7NaskYvMDLQY55gnW3NQ+mesEAepTqlg+VEbj7zzqEMBVNhzcGYYeqFo/TlYz6eQiFcp1HcsCZO+nGgS8zg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
    "node_modules/get-caller-file": {
      "version": "2.0.5",
      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
@@ -1100,6 +1722,16 @@
      "integrity": "sha512-SyHy3T1v2NUXn29OsWdxmK6RwHD+vkj3v8en8AOBZ1wBQ/hCAQ5bAQTD02kW4W9tUp/3Qh6J8r9EvntiyCmOOw==",
      "license": "MIT"
    },
+    "node_modules/globals": {
+      "version": "11.12.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-11.12.0.tgz",
+      "integrity": "sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=4"
+      }
+    },
    "node_modules/globalyzer": {
      "version": "0.1.0",
      "resolved": "https://registry.npmjs.org/globalyzer/-/globalyzer-0.1.0.tgz",
@@ -1318,6 +1950,13 @@
      "integrity": "sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==",
      "license": "ISC"
    },
+    "node_modules/js-tokens": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+      "dev": true,
+      "license": "MIT"
+    },
    "node_modules/js-yaml": {
      "version": "3.14.1",
      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
@@ -1331,6 +1970,33 @@
        "js-yaml": "bin/js-yaml.js"
      }
    },
+    "node_modules/jsesc": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-3.1.0.tgz",
+      "integrity": "sha512-/sM3dO2FOzXjKQhJuo0Q173wf2KOo8t4I8vHy6lF9poUp7bKT0/NHE8fPX23PwfhnykfqnC2xRxOnVw5XuGIaA==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "jsesc": "bin/jsesc"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/json5": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "bin": {
+        "json5": "lib/cli.js"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
    "node_modules/jsonfile": {
      "version": "6.1.0",
      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
@@ -1662,6 +2328,17 @@
        "url": "https://github.com/chalk/slice-ansi?sponsor=1"
      }
    },
+    "node_modules/lru-cache": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-5.1.1.tgz",
+      "integrity": "sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==",
+      "dev": true,
+      "license": "ISC",
+      "peer": true,
+      "dependencies": {
+        "yallist": "^3.0.2"
+      }
+    },
    "node_modules/merge-stream": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/merge-stream/-/merge-stream-2.0.0.tgz",
@@ -1817,6 +2494,14 @@
      "integrity": "sha512-eh0GgfEkpnoWDq+VY8OyvYhFEzBk6jIYbRKdIlyTiAXIVJ8PyBaKb0rp7oDtoddbdoHWhq8wwr+XZ81F1rpNdA==",
      "license": "MIT"
    },
+    "node_modules/node-releases": {
+      "version": "2.0.19",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.19.tgz",
+      "integrity": "sha512-xxOWJsBKtzAq7DY0J+DTzuz58K8e7sJbdgwkbMWQe8UYB6ekmsQ45q0M/tJDsGaZmbC+l7n57UV8Hl5tHxO9uw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
    "node_modules/normalize-path": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
@@ -1897,6 +2582,13 @@
        "node": ">=8"
      }
    },
+    "node_modules/picocolors": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
+      "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==",
+      "dev": true,
+      "license": "ISC"
+    },
    "node_modules/picomatch": {
      "version": "2.3.1",
      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
@@ -2778,6 +3470,38 @@
        "node": ">= 10.0.0"
      }
    },
+    "node_modules/update-browserslist-db": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.1.3.tgz",
+      "integrity": "sha512-UxhIZQ+QInVdunkDAaiazvvT/+fXL5Osr0JZlJulepYu6Jd7qJtDZjlur0emRlT71EN3ScPoE7gvsuIKKNavKw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/browserslist"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/browserslist"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "escalade": "^3.2.0",
+        "picocolors": "^1.1.1"
+      },
+      "bin": {
+        "update-browserslist-db": "cli.js"
+      },
+      "peerDependencies": {
+        "browserslist": ">= 4.21.0"
+      }
+    },
    "node_modules/util-deprecate": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -2885,6 +3609,14 @@
        "node": ">=0.4"
      }
    },
+    "node_modules/yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
+      "dev": true,
+      "license": "ISC",
+      "peer": true
+    },
    "node_modules/yaml": {
      "version": "2.7.0",
      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.7.0.tgz",
--- a/package.json
+++ b/package.json
@@ -43,6 +43,7 @@
    "@zen-browser/surfer": "^1.11.7"
  },
  "devDependencies": {
+    "@babel/preset-typescript": "^7.27.0",
    "formal-git": "^1.1.5",
    "husky": "^9.1.7",
    "lint-staged": "^15.3.0",
--- a/scripts/update_ts_types.py
+++ b/scripts/update_ts_types.py
@@ -0,0 +1,43 @@
+
+import os
+
+FILES = [
+    "index.d.ts",
+    "lib.gecko.darwin.d.ts",
+    "lib.gecko.dom.d.ts",
+    "lib.gecko.glean.d.ts",
+    "lib.gecko.linux.d.ts",
+    "lib.gecko.modules.d.ts",
+    "lib.gecko.nsresult.d.ts",
+    "lib.gecko.services.d.ts",
+    "lib.gecko.tweaks.d.ts",
+    "lib.gecko.win32.d.ts",
+    "lib.gecko.xpcom.d.ts",
+    "lib.gecko.xpidl.d.ts",
+]
+
+ENGINE_PATH = os.path.join("engine", "tools", "@types")
+SRC_PATH = os.path.join("src", "zen", "@types")
+
+
+def update_ts_types():
+  os.system("cd engine && ./mach ts build && ./mach ts update")
+  # copy the files from engine/tools/@types to src/@types
+  for file in FILES:
+    src_file = os.path.join(ENGINE_PATH, file)
+    dest_file = os.path.join(SRC_PATH, file)
+    if os.path.exists(src_file):
+      os.system(f"cp {src_file} {dest_file}")
+    else:
+      print(f"File {src_file} does not exist.")
+
+  # add zen.d.ts to the end of index.d.ts
+  with open(os.path.join(SRC_PATH, "index.d.ts"), "a") as f:
+    f.write("\n")
+    f.write('/// <reference types="./zen.d.ts" />\n')
+    f.write('\n')
+
+
+if __name__ == "__main__":
+  update_ts_types()
+  print("Updated TypeScript types.")
--- a/src/browser/base/content/navigator-toolbox-inc-xhtml.patch
+++ b/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 00c8976d3e258c0875d7da2f3ec823d8907a84c9..3ce6fea52f8170f6cd821a66684248b4c0a765c6 100644
+index 00c8976d3e258c0875d7da2f3ec823d8907a84c9..b5735712aaa7c2ae2baa4b858e735413b130ca94 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 00c8976d3e258c0875d7da2f3ec823d8907a84c9..3ce6fea52f8170f6cd821a66684248b4
               tooltip="tabbrowser-tab-tooltip"
               orient="horizontal"
               stopwatchid="tabClick">
-+<html:div id="zen-essentials-container" skipintoolbarset="true"></html:div>
+<html:div id="zen-essentials-wrapper" skipintoolbarset="true"></html:div>
 +<hbox id="zen-current-workspace-indicator-container"></hbox>
 +<html:div id="zen-tabs-wrapper">
 +<html:div id="zen-browser-tabs-container">
--- a/src/browser/base/content/zen-assets.jar.inc.mn
+++ b/src/browser/base/content/zen-assets.jar.inc.mn
@@ -53,7 +53,6 @@
        content/browser/zen-components/ZenPinnedTabManager.mjs                  (../../zen/tabs/ZenPinnedTabManager.mjs)
        content/browser/zen-styles/zen-tabs.css                                 (../../zen/tabs/zen-tabs.css)
 *       content/browser/zen-styles/zen-tabs/vertical-tabs.css                   (../../zen/tabs/zen-tabs/vertical-tabs.css)
-        content/browser/zen-styles/zen-tabs/horizontal-tabs.css                 (../../zen/tabs/zen-tabs/horizontal-tabs.css)

        content/browser/zen-components/ZenGlanceManager.mjs                     (../../zen/glance/ZenGlanceManager.mjs)
        content/browser/zen-styles/zen-glance.css                               (../../zen/glance/zen-glance.css)
--- a/src/browser/components/tabbrowser/content/tabbrowser-js.patch
+++ b/src/browser/components/tabbrowser/content/tabbrowser-js.patch
@@ -1,24 +1,11 @@
 diff --git a/browser/components/tabbrowser/content/tabbrowser.js b/browser/components/tabbrowser/content/tabbrowser.js
-index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b930f411c 100644
+index bfba253af3253a8cf547a5d69a1695651fc5c203..d4c7c37e06dc74cf0de3a10e6682f26ada76767d 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
-@@ -415,11 +415,71 @@
+@@ -415,11 +415,58 @@
       return this.tabContainer.visibleTabs;
     }
 
-+    get _numVisiblePinTabs() {
-+      let i = 0;
-+      for (let tab of this.tabs) {
-+        if (!tab.pinned && !tab.hasAttribute("zen-glance-tab")) {
-+          break;
-+        }
-+        if (!tab.hidden) {
-+          i += !tab.hasAttribute("zen-glance-tab");
-+        }
-+      }
-+      return i;
-+    }
-+
 +    zenInsertTabAtIndex(...args) {
 +      return this.#insertTabAtElementIndex(...args);
 +    }
@@ -76,7 +63,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       }
       return i;
     }
-@@ -549,6 +609,7 @@
+@@ -549,6 +596,7 @@
       this.tabpanels.appendChild(panel);
 
       let tab = this.tabs[0];
@@ -84,7 +71,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       tab.linkedPanel = uniqueId;
       this._selectedTab = tab;
       this._selectedBrowser = browser;
-@@ -814,11 +875,13 @@
+@@ -814,11 +862,13 @@
       }
 
       this.showTab(aTab);
@@ -94,14 +81,14 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
 +      if (this.tabContainer.verticalMode && !handled) {
         this.#handleTabMove(aTab, () =>
 -          this.verticalPinnedTabsContainer.appendChild(aTab)
-+          aTab.hasAttribute("zen-essential") ? document.getElementById("zen-essentials-container").appendChild(aTab) : this.verticalPinnedTabsContainer.insertBefore(aTab, this.verticalPinnedTabsContainer.lastChild)
+          aTab.hasAttribute("zen-essential") ? ZenWorkspaces.getEssentialsSection(aTab).appendChild(aTab) : this.verticalPinnedTabsContainer.insertBefore(aTab, this.verticalPinnedTabsContainer.lastChild)
         );
 -      } else {
 +      } else if (!handled) {
         this.moveTabTo(aTab, {
           tabIndex: this.pinnedTabCount,
           forceUngrouped: true,
-@@ -835,12 +898,15 @@
+@@ -835,12 +885,15 @@
       }
 
       if (this.tabContainer.verticalMode) {
@@ -118,7 +105,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         });
       } else {
         this.moveTabTo(aTab, {
-@@ -1024,6 +1090,8 @@
+@@ -1024,6 +1077,8 @@
 
       let LOCAL_PROTOCOLS = ["chrome:", "about:", "resource:", "data:"];
 
@@ -127,7 +114,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       if (
         aIconURL &&
         !aLoadingPrincipal &&
-@@ -1034,6 +1102,9 @@
+@@ -1034,6 +1089,9 @@
         );
         return;
       }
@@ -137,7 +124,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
 
       let browser = this.getBrowserForTab(aTab);
       browser.mIconURL = aIconURL;
-@@ -1283,6 +1354,7 @@
+@@ -1283,6 +1341,7 @@
       if (!this._previewMode) {
         newTab.recordTimeFromUnloadToReload();
         newTab.updateLastAccessed();
@@ -145,7 +132,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         oldTab.updateLastAccessed();
         // if this is the foreground window, update the last-seen timestamps.
         if (this.ownerGlobal == BrowserWindowTracker.getTopWindow()) {
-@@ -1435,6 +1507,9 @@
+@@ -1435,6 +1494,9 @@
       }
 
       let activeEl = document.activeElement;
@@ -155,7 +142,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       // If focus is on the old tab, move it to the new tab.
       if (activeEl == oldTab) {
         newTab.focus();
-@@ -1758,7 +1833,8 @@
+@@ -1758,7 +1820,8 @@
     }
 
     _setTabLabel(aTab, aLabel, { beforeTabOpen, isContentTitle, isURL } = {}) {
@@ -165,7 +152,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         return false;
       }
 
-@@ -1866,7 +1942,7 @@
+@@ -1866,7 +1929,7 @@
         newIndex = this.selectedTab._tPos + 1;
       }
 
@@ -174,7 +161,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         if (this.isTabGroupLabel(targetTab)) {
           throw new Error(
             "Replacing a tab group label with a tab is not supported"
-@@ -2130,6 +2206,7 @@
+@@ -2130,6 +2193,7 @@
       uriIsAboutBlank,
       userContextId,
       skipLoad,
@@ -182,7 +169,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
     } = {}) {
       let b = document.createXULElement("browser");
       // Use the JSM global to create the permanentKey, so that if the
-@@ -2203,8 +2280,7 @@
+@@ -2203,8 +2267,7 @@
         // we use a different attribute name for this?
         b.setAttribute("name", name);
       }
@@ -192,7 +179,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         b.setAttribute("transparent", "true");
       }
 
-@@ -2369,7 +2445,7 @@
+@@ -2369,7 +2432,7 @@
 
       let panel = this.getPanel(browser);
       let uniqueId = this._generateUniquePanelID();
@@ -201,7 +188,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       aTab.linkedPanel = uniqueId;
 
       // Inject the <browser> into the DOM if necessary.
-@@ -2428,8 +2504,8 @@
+@@ -2428,8 +2491,8 @@
       // 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) {
@@ -212,7 +199,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       } else {
         aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
       }
-@@ -2657,6 +2733,7 @@
+@@ -2657,6 +2720,7 @@
         schemelessInput,
         hasValidUserGestureActivation = false,
         textDirectiveUserActivation = false,
@@ -220,7 +207,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       } = {}
     ) {
       // all callers of addTab that pass a params object need to pass
-@@ -2667,6 +2744,12 @@
+@@ -2667,6 +2731,12 @@
         );
       }
 
@@ -233,7 +220,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       if (!UserInteraction.running("browser.tabs.opening", window)) {
         UserInteraction.start("browser.tabs.opening", "initting", window);
       }
-@@ -2730,6 +2813,16 @@
+@@ -2730,6 +2800,16 @@
           noInitialLabel,
           skipBackgroundNotify,
         });
@@ -250,7 +237,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         if (insertTab) {
           if (typeof index == "number") {
             elementIndex = this.#tabIndexToElementIndex(index);
-@@ -2756,6 +2849,7 @@
+@@ -2756,6 +2836,7 @@
           initialBrowsingContextGroupId,
           openWindowInfo,
           skipLoad,
@@ -258,7 +245,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         }));
 
         if (focusUrlBar) {
-@@ -2875,6 +2969,9 @@
+@@ -2875,6 +2956,9 @@
         }
       }
 
@@ -268,7 +255,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       // Additionally send pinned tab events
       if (pinned) {
         this._notifyPinnedStatus(t);
-@@ -2922,12 +3019,15 @@
+@@ -2922,12 +3006,15 @@
      * @param {string} [label=]
      * @returns {MozTabbrowserTabGroup}
      */
@@ -285,7 +272,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       return group;
     }
 
-@@ -2970,6 +3070,7 @@
+@@ -2970,6 +3057,7 @@
         insertBefore = null,
         isUserTriggered = false,
         telemetryUserCreateSource = "unknown",
@@ -293,7 +280,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       } = {}
     ) {
       if (!tabs?.length) {
-@@ -2988,7 +3089,12 @@
+@@ -2988,7 +3076,12 @@
         id = `${Date.now()}-${Math.round(Math.random() * 100)}`;
       }
       let group = this._createTabGroup(id, color, false, label);
@@ -307,7 +294,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         group,
         insertBefore?.group ?? insertBefore
       );
-@@ -3318,6 +3424,7 @@
+@@ -3318,6 +3411,7 @@
         initialBrowsingContextGroupId,
         openWindowInfo,
         skipLoad,
@@ -315,7 +302,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       }
     ) {
       // If we don't have a preferred remote type, and we have a remote
-@@ -3381,6 +3488,7 @@
+@@ -3381,6 +3475,7 @@
           openWindowInfo,
           name,
           skipLoad,
@@ -323,7 +310,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         });
       }
 
-@@ -3559,6 +3667,27 @@
+@@ -3559,6 +3654,27 @@
         ) {
           tabWasReused = true;
           tab = this.selectedTab;
@@ -351,7 +338,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
           if (!tabData.pinned) {
             this.unpinTab(tab);
           } else {
-@@ -3607,8 +3736,28 @@
+@@ -3607,8 +3723,28 @@
             skipLoad: true,
             preferredRemoteType,
           });
@@ -382,18 +369,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
             tabToSelect = tab;
           }
         }
-@@ -3620,8 +3769,8 @@
-           // inserted in the DOM. If the tab is not yet in the DOM,
-           // just insert it in the right place from the start.
-           if (!tab.parentNode) {
-            tab._tPos = this.pinnedTabCount;
-            this.tabContainer.insertBefore(tab, this.tabs[this.pinnedTabCount]);
-+            tab._tPos = this._numVisiblePinTabs;
-+            this.tabContainer.insertBefore(tab, this.tabs[this._numVisiblePinTabs]);
-             tab.toggleAttribute("pinned", true);
-             this.tabContainer._invalidateCachedTabs();
-             // Then ensure all the tab open/pinning information is sent.
-@@ -3631,7 +3780,8 @@
+@@ -3631,7 +3767,8 @@
             // needs calling:
             shouldUpdateForPinnedTabs = true;
           }
@@ -403,7 +379,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
           let { groupId } = tabData;
           const tabGroup = tabGroupWorkingData.get(groupId);
           // if a tab refers to a tab group we don't know, skip any group
-@@ -3645,7 +3795,10 @@
+@@ -3645,7 +3782,10 @@
                 tabGroup.stateData.id,
                 tabGroup.stateData.color,
                 tabGroup.stateData.collapsed,
@@ -415,17 +391,18 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
               );
               tabsFragment.appendChild(tabGroup.node);
             }
-@@ -3696,6 +3849,9 @@
+@@ -3696,6 +3836,10 @@
         this.selectedTab = tabToSelect;
         this.removeTab(leftoverTab);
       }
 +      else {
 +        this.selectedTab._possiblyEmpty = this.selectedTab.isEmpty; // Not needed, but just in case.
+        gBrowser.removeTab(this.selectedTab);
 +      }
 
       if (tabs.length > 1 || !tabs[0].selected) {
         this._updateTabsAfterInsert();
-@@ -3882,7 +4038,7 @@
+@@ -3882,7 +4026,7 @@
       // Ensure we have an index if one was not provided.
       if (typeof index != "number") {
         // Move the new tab after another tab if needed, to the end otherwise.
@@ -434,7 +411,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         if (
           !bulkOrderedOpen &&
           ((openerTab &&
-@@ -3928,18 +4084,18 @@
+@@ -3928,18 +4072,18 @@
 
       // Ensure index is within bounds.
       if (tab.pinned) {
@@ -457,7 +434,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         if (this.isTab(itemAfter) && itemAfter.group == tabGroup) {
           // Place at the front of, or between tabs in, the same tab group
           this.tabContainer.insertBefore(tab, itemAfter);
-@@ -4260,6 +4416,9 @@
+@@ -4260,6 +4404,9 @@
         return;
       }
 
@@ -467,7 +444,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       this.removeTabs(selectedTabs, { telemetrySource });
     }
 
-@@ -4512,6 +4671,7 @@
+@@ -4512,6 +4659,7 @@
         telemetrySource,
       } = {}
     ) {
@@ -475,7 +452,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
       // can be considered equivalent to closing the window.
       if (
-@@ -4596,6 +4756,7 @@
+@@ -4596,6 +4744,7 @@
         if (lastToClose) {
           this.removeTab(lastToClose, aParams);
         }
@@ -483,7 +460,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       } catch (e) {
         console.error(e);
       }
-@@ -4620,6 +4781,7 @@
+@@ -4620,6 +4769,7 @@
         telemetrySource,
       } = {}
     ) {
@@ -491,7 +468,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       if (UserInteraction.running("browser.tabs.opening", window)) {
         UserInteraction.finish("browser.tabs.opening", window);
       }
-@@ -4633,6 +4795,12 @@
+@@ -4633,6 +4783,12 @@
         aTab._closeTimeNoAnimTimerId = Glean.browserTabclose.timeNoAnim.start();
       }
 
@@ -504,7 +481,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       // Handle requests for synchronously removing an already
       // asynchronously closing tab.
       if (!animate && aTab.closing) {
-@@ -4647,7 +4815,9 @@
+@@ -4647,7 +4803,9 @@
       // frame created for it (for example, by updating the visually selected
       // state).
       let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
@@ -515,7 +492,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       if (
         !this._beginRemoveTab(aTab, {
           closeWindowFastpath: true,
-@@ -4810,7 +4980,7 @@
+@@ -4810,7 +4968,7 @@
           closeWindowWithLastTab != null
             ? closeWindowWithLastTab
             : !window.toolbar.visible ||
@@ -524,7 +501,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
 
         if (closeWindow) {
           // We've already called beforeunload on all the relevant tabs if we get here,
-@@ -4834,6 +5004,7 @@
+@@ -4834,6 +4992,7 @@
 
         newTab = true;
       }
@@ -532,7 +509,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       aTab._endRemoveArgs = [closeWindow, newTab];
 
       // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -4873,9 +5044,7 @@
+@@ -4873,9 +5032,7 @@
       aTab._mouseleave();
 
       if (newTab) {
@@ -543,7 +520,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       } else {
         TabBarVisibility.update();
       }
-@@ -5004,6 +5173,8 @@
+@@ -5004,6 +5161,8 @@
         this.tabs[i]._tPos = i;
       }
 
@@ -552,7 +529,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       if (!this._windowIsClosing) {
         if (wasPinned) {
           this.tabContainer._positionPinnedTabs();
-@@ -5129,8 +5300,8 @@
+@@ -5129,8 +5288,8 @@
       return closedCount;
     }
 
@@ -563,7 +540,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       if (unloadBlocked) {
         return;
       }
-@@ -5230,13 +5401,13 @@
+@@ -5230,13 +5389,13 @@
         !excludeTabs.has(aTab.owner) &&
         Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
       ) {
@@ -579,7 +556,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       );
 
       let tab = this.tabContainer.findNextTab(aTab, {
-@@ -5252,7 +5423,7 @@
+@@ -5252,7 +5411,7 @@
       }
 
       if (tab) {
@@ -588,7 +565,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       }
 
       // If no qualifying visible tab was found, see if there is a tab in
-@@ -5273,7 +5444,7 @@
+@@ -5273,7 +5432,7 @@
         });
       }
 
@@ -597,7 +574,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
     }
 
     _blurTab(aTab) {
-@@ -5674,10 +5845,10 @@
+@@ -5674,10 +5833,10 @@
       SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
     }
 
@@ -610,22 +587,22 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         aTab.selected ||
         aTab.closing ||
         // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -5971,7 +6142,7 @@
+@@ -5971,7 +6130,7 @@
 
       // Don't allow mixing pinned and unpinned tabs.
       if (this.isTab(element) && element.pinned) {
 -        tabIndex = Math.min(tabIndex, this.pinnedTabCount - 1);
-+        tabIndex = aTab.hasAttribute('zen-essential') ? Math.min(tabIndex, this._numZenEssentials - 1) : Math.min(tabIndex, this.pinnedTabCount - 1);
+        tabIndex = element.hasAttribute('zen-essential') ? Math.min(tabIndex, this._numZenEssentials - 1) : Math.min(tabIndex, this.pinnedTabCount - 1);
       } else {
         tabIndex = Math.max(tabIndex, this.pinnedTabCount);
       }
-@@ -5998,9 +6169,16 @@
+@@ -5998,9 +6157,16 @@
         element,
         () => {
           let neighbor = this.tabs[tabIndex];
 -          if (forceUngrouped && neighbor.group) {
 +          const _tPos = element._tPos;
-+          if ((forceStandaloneTab && neighbor.group) || neighbor.group?.hasAttribute("split-view-group")) {
+          if ((forceUngrouped && neighbor?.group) || neighbor?.group?.hasAttribute("split-view-group")) {
             neighbor = neighbor.group;
           }
 +          if (element.group?.hasAttribute("split-view-group")) {
@@ -637,7 +614,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
           if (neighbor && this.isTab(element) && tabIndex > element._tPos) {
             neighbor.after(element);
           } else {
-@@ -6069,7 +6247,9 @@
+@@ -6069,7 +6235,9 @@
           targetElement = targetElement.group;
         }
       }
@@ -648,7 +625,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       // Don't allow mixing pinned and unpinned tabs.
       if (element.pinned && !targetElement?.pinned) {
         targetElement = this.tabs[this.pinnedTabCount - 1];
-@@ -6079,7 +6259,13 @@
+@@ -6079,7 +6247,13 @@
         moveBefore = true;
       }
 
@@ -657,12 +634,12 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
 +      }
       let getContainer = () => {
 +        if (element.hasAttribute("zen-essential")) {
-+          return document.getElementById("zen-essentials-container");
+          return ZenWorkspaces.getEssentialsSection(element);
 +        }
         if (element.pinned && this.tabContainer.verticalMode) {
           return this.tabContainer.verticalPinnedTabsContainer;
         }
-@@ -6139,7 +6325,7 @@
+@@ -6139,7 +6313,7 @@
       if (!this.isTab(aTab)) {
         throw new Error("Can only move a tab into a tab group");
       }
@@ -671,7 +648,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
         return;
       }
       if (aTab.group && aTab.group.id === aGroup.id) {
-@@ -6233,6 +6419,10 @@
+@@ -6233,6 +6407,10 @@
 
       moveActionCallback();
 
@@ -682,16 +659,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
       // Clear tabs cache after moving nodes because the order of tabs may have
       // changed.
       this.tabContainer._invalidateCachedTabs();
-@@ -6290,7 +6480,7 @@
-         createLazyBrowser,
-       };
- 
-      let numPinned = this.pinnedTabCount;
-+      let numPinned = this._numVisiblePinTabs;
-       if (
-         elementIndex < numPinned ||
-         (aTab.pinned && elementIndex == numPinned)
-@@ -7050,7 +7240,7 @@
+@@ -7050,7 +7228,7 @@
             // preventDefault(). It will still raise the window if appropriate.
             break;
           }
@@ -700,7 +668,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
           window.focus();
           aEvent.preventDefault();
           break;
-@@ -7951,6 +8141,7 @@
+@@ -7951,6 +8129,7 @@
             aWebProgress.isTopLevel
           ) {
             this.mTab.setAttribute("busy", "true");
@@ -708,7 +676,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
             gBrowser._tabAttrModified(this.mTab, ["busy"]);
             this.mTab._notselectedsinceload = !this.mTab.selected;
           }
-@@ -8924,7 +9115,7 @@ var TabContextMenu = {
+@@ -8924,7 +9103,7 @@ var TabContextMenu = {
     );
     contextUnpinSelectedTabs.hidden =
       !this.contextTab.pinned || !this.multiselected;
@@ -717,16 +685,7 @@ index bfba253af3253a8cf547a5d69a1695651fc5c203..24cedfa868878d1619c9d9d04a060a0b
     // Move Tab items
     let contextMoveTabOptions = document.getElementById(
       "context_moveTabOptions"
-@@ -8958,7 +9149,7 @@ var TabContextMenu = {
-     let isFirstTab =
-       !this.contextTabs[0].group &&
-       (this.contextTabs[0] == visibleTabs[0] ||
-        this.contextTabs[0] == visibleTabs[gBrowser.pinnedTabCount]);
-+      this.contextTabs[0] == visibleTabs[gBrowser._numVisiblePinTabs]);
-     contextMoveTabToStart.disabled = isFirstTab && allSelectedTabsAdjacent;
- 
-     document.getElementById("context_openTabInWindow").disabled =
-@@ -9193,6 +9384,7 @@ var TabContextMenu = {
+@@ -9193,6 +9372,7 @@ var TabContextMenu = {
         telemetrySource: gBrowser.TabMetrics.METRIC_SOURCE.TAB_STRIP,
       });
     } else {
--- a/src/browser/components/tabbrowser/content/tabs-js.patch
+++ b/src/browser/components/tabbrowser/content/tabs-js.patch
@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/tabs.js b/browser/components/tabbrowser/content/tabs.js
-index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9d21d56ac 100644
+index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..37870bfe9e0d9605907515fd17c437c2dfc167e6 100644
 --- a/browser/components/tabbrowser/content/tabs.js
 +++ b/browser/components/tabbrowser/content/tabs.js
@@ -83,7 +83,7 @@
@@ -155,7 +155,7 @@ index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9
 
       this.#allTabs = [
 -        ...this.verticalPinnedTabsContainer.children,
-+        ...document.getElementById("zen-essentials-container").children, ...this.verticalPinnedTabsContainer.children,
+        ...ZenWorkspaces.getCurrentEssentialsContainer().children, ...this.verticalPinnedTabsContainer.children,
         ...children,
       ];
 +      const lastPinnedTabIdx = gBrowser.pinnedTabCount;
@@ -210,7 +210,7 @@ index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9
 
       let focusableItems = [];
 -      for (let child of children) {
-+      for (let child of [...document.getElementById("zen-essentials-container").children, ...verticalPinnedTabsContainer.children, ...children]) {
+      for (let child of [...ZenWorkspaces.getCurrentEssentialsContainer().children, ...verticalPinnedTabsContainer.children, ...children]) {
         if (isTab(child) && child.visible) {
           child.elementIndex = elementIndex++;
           focusableItems.push(child);
@@ -271,15 +271,6 @@ index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9
           const newTab2 = this.newTabButton;
           const newTabVertical = document.getElementById(
             "vertical-tabs-newtab-button"
-@@ -1929,7 +1963,7 @@
-           let rect = ele => {
-             return window.windowUtils.getBoundsWithoutFlushing(ele);
-           };
-          let tab = this.visibleTabs[gBrowser.pinnedTabCount];
-+          let tab = this.visibleTabs[gBrowser._numVisiblePinTabs];
-           if (tab && rect(tab).width <= this._tabClipWidth) {
-             this.setAttribute("closebuttons", "activetab");
-           } else {
@@ -1941,10 +1975,12 @@
 
     _handleTabSelect(aInstant) {
@@ -307,12 +298,12 @@ index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9
 -        let tabs = this.visibleTabs;
 +      if (!ZenWorkspaces._hasInitializedTabsStrip) return;
 +      let count = ZenWorkspaces.makeSurePinTabIsInCorrectPosition();
-+      if (gBrowser.pinnedTabCount !== (verticalTabsContainer.children.length - count - 1 + document.getElementById("zen-essentials-container").children.length)) {
+      if (gBrowser.pinnedTabCount !== (verticalTabsContainer.children.length - count - 1 + ZenWorkspaces.getCurrentEssentialsContainer().children.length)) {
 +        let tabs = this.allTabs.filter(tab => !tab.hasAttribute("zen-glance-tab"));
         for (let i = 0; i < numPinned; i++) {
           tabs[i].style.marginInlineStart = "";
 -          verticalTabsContainer.appendChild(tabs[i]);
-+          tabs[i].hasAttribute("zen-essential") ? document.getElementById("zen-essentials-container").appendChild(tabs[i].group?.hasAttribute("split-view-group") ? tabs[i].group : tabs[i]) : verticalTabsContainer.insertBefore(tabs[i].group?.hasAttribute("split-view-group") ? tabs[i].group : tabs[i], verticalTabsContainer.lastChild);
+          tabs[i].hasAttribute("zen-essential") ? ZenWorkspaces.getCurrentEssentialsContainer().appendChild(tabs[i].group?.hasAttribute("split-view-group") ? tabs[i].group : tabs[i]) : verticalTabsContainer.insertBefore(tabs[i].group?.hasAttribute("split-view-group") ? tabs[i].group : tabs[i], verticalTabsContainer.lastChild);
         }
       }
 
@@ -327,17 +318,15 @@ index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9
 
       if (!verticalTabsContainer.children.length) {
         return;
-@@ -2117,8 +2150,8 @@
+@@ -2117,7 +2150,7 @@
     }
 
     _positionPinnedTabs() {
 -      let tabs = this.visibleTabs;
-      let numPinned = gBrowser.pinnedTabCount;
 +      let tabs = this.visibleTabs.filter(tab => !tab.hasAttribute("zen-glance-tab"));
-+      let numPinned = gBrowser._numVisiblePinTabs;
+       let numPinned = gBrowser.pinnedTabCount;
       let absPositionHorizontalTabs =
         this.overflowing && tabs.length > numPinned && numPinned > 0;
- 
@@ -2127,7 +2160,7 @@
 
       if (this.verticalMode) {
@@ -374,7 +363,7 @@ index ef9c0389ec926e6bc01c0dc3b883beceaf1f7d43..eee9613b4405a8a301cef3db1ae6a3f9
 -      let tabs = this.ariaFocusableItems.slice(
 -        isPinned ? 0 : numPinned,
 -        isPinned ? numPinned : undefined
-+      let isPinned = draggedTab?.group.pinned || draggedTab.pinned;
+      let isPinned = draggedTab?.group ? draggedTab.group.pinned : draggedTab.pinned;
 +      let numPinned = gBrowser._numVisiblePinTabsWithoutCollapsed;
 +      let essential = draggedTab.hasAttribute("zen-essential");
 +      let tabs = this.ariaFocusableItems.filter(tab => !tab.hasAttribute("zen-glance-tab")).slice(
--- a/src/zen/@types/index.d.ts
+++ b/src/zen/@types/index.d.ts
@@ -0,0 +1,36 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+/// <reference types="./lib.gecko.dom.d.ts" />
+/// <reference types="./lib.gecko.glean.d.ts" />
+/// <reference types="./lib.gecko.nsresult.d.ts" />
+/// <reference types="./lib.gecko.services.d.ts" />
+/// <reference types="./lib.gecko.xpcom.d.ts" />
+/// <reference types="./lib.gecko.xpidl.d.ts" />
+
+/// Platform specific XPCOM modules.
+/// <reference types="./lib.gecko.darwin.d.ts" />
+/// <reference types="./lib.gecko.linux.d.ts" />
+/// <reference types="./lib.gecko.win32.d.ts" />
+
+/// Order of references matters here, for overriding type signatures.
+/// <reference types="./lib.gecko.tweaks.d.ts" />
+
+declare global {
+  const Cc: nsXPCComponents_Classes;
+  const Ci: nsIXPCComponents_Interfaces;
+  const Components: nsIXPCComponents;
+  const Cr: nsIXPCComponents_Results;
+
+  // Resolve typed generic overloads before the generated ones.
+  const Cu: nsXPCComponents_Utils & nsIXPCComponents_Utils;
+
+  const Services: JSServices;
+  const uneval: (any) => string;
+}
+
+export {};
+
+/// <reference types="./zen.d.ts" />
--- a/src/zen/@types/lib.gecko.darwin.d.ts
+++ b/src/zen/@types/lib.gecko.darwin.d.ts
@@ -0,0 +1,225 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from source XPCOM .idl files.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+declare global {
+  // https://searchfox.org/mozilla-central/source/accessible/interfaces/nsIAccessibleMacInterface.idl
+
+  interface nsIAccessibleMacNSObjectWrapper extends nsISupports {}
+
+  interface nsIAccessibleMacInterface extends nsISupports {
+    readonly attributeNames: string[];
+    readonly parameterizedAttributeNames: string[];
+    readonly actionNames: string[];
+    getAttributeValue(attributeName: string): any;
+    getParameterizedAttributeValue(attributeName: string, parameter: any): any;
+    performAction(actionName: string): void;
+    isAttributeSettable(attributeName: string): boolean;
+    setAttributeValue(attributeName: string, attributeValue: any): void;
+  }
+
+  interface nsIAccessibleMacEvent extends nsISupports {
+    readonly macIface: nsIAccessibleMacInterface;
+    readonly data: any;
+  }
+
+  // https://searchfox.org/mozilla-central/source/browser/components/migration/nsIKeychainMigrationUtils.idl
+
+  interface nsIKeychainMigrationUtils extends nsISupports {
+    getGenericPassword(aServiceName: string, aAccountName: string): string;
+  }
+
+  // https://searchfox.org/mozilla-central/source/browser/components/shell/nsIMacShellService.idl
+
+  interface nsIMacShellService extends nsIShellService {
+    showDesktopPreferences(): void;
+    showSecurityPreferences(aPaneID: string): void;
+    getAvailableApplicationsForProtocol(protocol: string): string[][];
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIMacDockSupport.idl
+
+  interface nsIAppBundleLaunchOptions extends nsISupports {
+    readonly addsToRecentItems: boolean;
+  }
+
+  interface nsIMacDockSupport extends nsISupports {
+    dockMenu: nsIStandaloneNativeMenu;
+    activateApplication(aIgnoreOtherApplications: boolean): void;
+    badgeText: string;
+    setBadgeImage(aBadgeImage: imgIContainer, aPaintContext?: nsISVGPaintContext): void;
+    readonly isAppInDock: boolean;
+    ensureAppIsPinnedToDock(aAppPath?: string, aAppToReplacePath?: string): boolean;
+    launchAppBundle(aAppBundle: nsIFile, aArgs: string[], aLaunchOptions?: nsIAppBundleLaunchOptions): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIMacFinderProgress.idl
+
+  type nsIMacFinderProgressCanceledCallback = Callable<{
+    canceled(): void;
+  }>;
+
+  interface nsIMacFinderProgress extends nsISupports {
+    init(path: string, canceledCallback: nsIMacFinderProgressCanceledCallback): void;
+    updateProgress(currentProgress: u64, totalProgress: u64): void;
+    end(): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIMacSharingService.idl
+
+  interface nsIMacSharingService extends nsISupports {
+    getSharingProviders(pageUrl: string): any;
+    shareUrl(serviceName: string, pageUrl: string, pageTitle: string): void;
+    openSharingPreferences(): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIMacUserActivityUpdater.idl
+
+  interface nsIMacUserActivityUpdater extends nsISupports {
+    updateLocation(pageUrl: string, pageTitle: string, window: nsIBaseWindow): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIMacWebAppUtils.idl
+
+  type nsITrashAppCallback = Callable<{
+    trashAppFinished(rv: nsresult): void;
+  }>;
+
+  interface nsIMacWebAppUtils extends nsISupports {
+    pathForAppWithIdentifier(bundleIdentifier: string): string;
+    launchAppWithIdentifier(bundleIdentifier: string): void;
+    trashApp(path: string, callback: nsITrashAppCallback): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIStandaloneNativeMenu.idl
+
+  interface nsIStandaloneNativeMenu extends nsISupports {
+    init(aElement: Element): void;
+    menuWillOpen(): boolean;
+    activateNativeMenuItemAt(anIndexString: string): void;
+    forceUpdateNativeMenuAt(anIndexString: string): void;
+    dump(): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarProgress.idl
+
+  interface nsITaskbarProgress extends nsISupports {
+    readonly STATE_NO_PROGRESS?: 0;
+    readonly STATE_INDETERMINATE?: 1;
+    readonly STATE_NORMAL?: 2;
+    readonly STATE_ERROR?: 3;
+    readonly STATE_PAUSED?: 4;
+
+    setProgressState(state: nsTaskbarProgressState, currentValue?: u64, maxValue?: u64): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITouchBarHelper.idl
+
+  interface nsITouchBarHelper extends nsISupports {
+    readonly activeUrl: string;
+    readonly activeTitle: string;
+    readonly isUrlbarFocused: boolean;
+    toggleFocusUrlbar(): void;
+    unfocusUrlbar(): void;
+    allItems: nsIArray;
+    readonly document: Document;
+    getTouchBarInput(aInputName: string): nsITouchBarInput;
+    insertRestrictionInUrlbar(aToken: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITouchBarInput.idl
+
+  type nsITouchBarInputCallback = Callable<{
+    onCommand(): void;
+  }>;
+
+  interface nsITouchBarInput extends nsISupports {
+    readonly key: string;
+    title: string;
+    image: nsIURI;
+    type: string;
+    callback: nsITouchBarInputCallback;
+    color: u32;
+    disabled: boolean;
+    children: nsIArray;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITouchBarUpdater.idl
+
+  interface nsITouchBarUpdater extends nsISupports {
+    updateTouchBarInputs(aWindow: nsIBaseWindow, aInputs: nsITouchBarInput[]): void;
+    enterCustomizeMode(): void;
+    isTouchBarInitialized(): boolean;
+    setTouchBarInitialized(aIsInitialized: boolean): void;
+    showPopover(aWindow: nsIBaseWindow, aPopover: nsITouchBarInput, aShowing: boolean): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/xpcom/base/nsIMacPreferencesReader.idl
+
+  interface nsIMacPreferencesReader extends nsISupports {
+    policiesEnabled(): boolean;
+    readPreferences(): any;
+  }
+
+  // https://searchfox.org/mozilla-central/source/xpcom/io/nsILocalFileMac.idl
+
+  interface nsILocalFileMac extends nsIFile {
+    readonly fileSizeWithResFork: i64;
+    launchWithDoc(aDocToLoad: nsIFile, aLaunchInBackground: boolean): void;
+    openDocWithApp(aAppToOpenWith: nsIFile, aLaunchInBackground: boolean): void;
+    isPackage(): boolean;
+    readonly bundleDisplayName: string;
+    readonly bundleIdentifier: string;
+    readonly bundleContentsLastModifiedTime: i64;
+    hasXAttr(aAttrName: string): boolean;
+    getXAttr(aAttrName: string): u8[];
+    setXAttr(aAttrName: string, aAttrValue: u8[]): void;
+    delXAttr(aAttrName: string): void;
+  }
+
+  interface nsIXPCComponents_Interfaces {
+    nsIAccessibleMacNSObjectWrapper: nsJSIID<nsIAccessibleMacNSObjectWrapper>;
+    nsIAccessibleMacInterface: nsJSIID<nsIAccessibleMacInterface>;
+    nsIAccessibleMacEvent: nsJSIID<nsIAccessibleMacEvent>;
+    nsIKeychainMigrationUtils: nsJSIID<nsIKeychainMigrationUtils>;
+    nsIMacShellService: nsJSIID<nsIMacShellService>;
+    nsIAppBundleLaunchOptions: nsJSIID<nsIAppBundleLaunchOptions>;
+    nsIMacDockSupport: nsJSIID<nsIMacDockSupport>;
+    nsIMacFinderProgressCanceledCallback: nsJSIID<nsIMacFinderProgressCanceledCallback>;
+    nsIMacFinderProgress: nsJSIID<nsIMacFinderProgress>;
+    nsIMacSharingService: nsJSIID<nsIMacSharingService>;
+    nsIMacUserActivityUpdater: nsJSIID<nsIMacUserActivityUpdater>;
+    nsITrashAppCallback: nsJSIID<nsITrashAppCallback>;
+    nsIMacWebAppUtils: nsJSIID<nsIMacWebAppUtils>;
+    nsIStandaloneNativeMenu: nsJSIID<nsIStandaloneNativeMenu>;
+    nsITaskbarProgress: nsJSIID<nsITaskbarProgress>;
+    nsITouchBarHelper: nsJSIID<nsITouchBarHelper>;
+    nsITouchBarInputCallback: nsJSIID<nsITouchBarInputCallback>;
+    nsITouchBarInput: nsJSIID<nsITouchBarInput>;
+    nsITouchBarUpdater: nsJSIID<nsITouchBarUpdater>;
+    nsIMacPreferencesReader: nsJSIID<nsIMacPreferencesReader>;
+    nsILocalFileMac: nsJSIID<nsILocalFileMac>;
+  }
+} // global
+
+// Typedefs from xpidl.
+type PRTime = i64;
+type nsTaskbarProgressState = i32;
+
+// XPCOM internal utility types.
+
+/** XPCOM inout param is passed in as a js object with a value property. */
+type InOutParam<T> = { value: T };
+
+/** XPCOM out param is written to the passed in object's value property. */
+type OutParam<T> = { value?: T };
+
+/** Enable interfaces to inherit from enums: pick variants as optional. */
+type Enums<enums> = Partial<Pick<enums, keyof enums>>;
+
+/** Callable accepts either form of a [function] interface. */
+type Callable<iface> = iface | Extract<iface[keyof iface], Function>;
+
+export {};
--- a/src/zen/@types/lib.gecko.dom.d.ts
+++ b/src/zen/@types/lib.gecko.dom.d.ts
--- a/src/zen/@types/lib.gecko.glean.d.ts
+++ b/src/zen/@types/lib.gecko.glean.d.ts
@@ -0,0 +1,12 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from source metrics.yaml files.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+/// <reference types="./glean/browser_components_search.d.ts" />
+/// <reference types="./glean/browser_components_search_pings.d.ts" />
+/// <reference types="./glean/toolkit_components_extensions.d.ts" />
+/// <reference types="./glean/toolkit_components_places.d.ts" />
+/// <reference types="./glean/toolkit_components_search.d.ts" />
+/// <reference types="./glean/toolkit_mozapps_extensions.d.ts" />
--- a/src/zen/@types/lib.gecko.linux.d.ts
+++ b/src/zen/@types/lib.gecko.linux.d.ts
@@ -0,0 +1,80 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from source XPCOM .idl files.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+declare global {
+  // https://searchfox.org/mozilla-central/source/browser/components/shell/nsIGNOMEShellService.idl
+
+  interface nsIGNOMEShellService extends nsIShellService {
+    readonly canSetDesktopBackground: boolean;
+    isDefaultForScheme(aScheme: string): boolean;
+  }
+
+  // https://searchfox.org/mozilla-central/source/browser/components/shell/nsIOpenTabsProvider.idl
+
+  interface nsIOpenTabsProvider extends nsISupports {
+    getOpenTabs(): string[];
+    switchToOpenTab(url: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIApplicationChooser.idl
+
+  type nsIApplicationChooserFinishedCallback = Callable<{
+    done(handlerApp: nsIHandlerApp): void;
+  }>;
+
+  interface nsIApplicationChooser extends nsISupports {
+    init(parent: mozIDOMWindowProxy, title: string): void;
+    open(contentType: string, applicationChooserFinishedCallback: nsIApplicationChooserFinishedCallback): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIGtkTaskbarProgress.idl
+
+  interface nsIGtkTaskbarProgress extends nsITaskbarProgress {
+    setPrimaryWindow(aWindow: mozIDOMWindowProxy): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarProgress.idl
+
+  interface nsITaskbarProgress extends nsISupports {
+    readonly STATE_NO_PROGRESS?: 0;
+    readonly STATE_INDETERMINATE?: 1;
+    readonly STATE_NORMAL?: 2;
+    readonly STATE_ERROR?: 3;
+    readonly STATE_PAUSED?: 4;
+
+    setProgressState(state: nsTaskbarProgressState, currentValue?: u64, maxValue?: u64): void;
+  }
+
+  interface nsIXPCComponents_Interfaces {
+    nsIGNOMEShellService: nsJSIID<nsIGNOMEShellService>;
+    nsIOpenTabsProvider: nsJSIID<nsIOpenTabsProvider>;
+    nsIApplicationChooserFinishedCallback: nsJSIID<nsIApplicationChooserFinishedCallback>;
+    nsIApplicationChooser: nsJSIID<nsIApplicationChooser>;
+    nsIGtkTaskbarProgress: nsJSIID<nsIGtkTaskbarProgress>;
+    nsITaskbarProgress: nsJSIID<nsITaskbarProgress>;
+  }
+} // global
+
+// Typedefs from xpidl.
+type PRTime = i64;
+type nsHandlerInfoAction = i32;
+type nsTaskbarProgressState = i32;
+
+// XPCOM internal utility types.
+
+/** XPCOM inout param is passed in as a js object with a value property. */
+type InOutParam<T> = { value: T };
+
+/** XPCOM out param is written to the passed in object's value property. */
+type OutParam<T> = { value?: T };
+
+/** Enable interfaces to inherit from enums: pick variants as optional. */
+type Enums<enums> = Partial<Pick<enums, keyof enums>>;
+
+/** Callable accepts either form of a [function] interface. */
+type Callable<iface> = iface | Extract<iface[keyof iface], Function>;
+
+export {};
--- a/src/zen/@types/lib.gecko.modules.d.ts
+++ b/src/zen/@types/lib.gecko.modules.d.ts
@@ -0,0 +1,951 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated by running "mach ts paths".
+ */
+
+export interface LazyModules {
+  'chrome://browser/content/backup/backup-constants.mjs': typeof import('chrome://browser/content/backup/backup-constants.mjs');
+  'chrome://browser/content/firefoxview/helpers.mjs': typeof import('chrome://browser/content/firefoxview/helpers.mjs');
+  'chrome://browser/content/migration/migration-wizard-constants.mjs': typeof import('chrome://browser/content/migration/migration-wizard-constants.mjs');
+  'chrome://browser/content/nsContextMenu.sys.mjs': typeof import('chrome://browser/content/nsContextMenu.sys.mjs');
+  'chrome://devtools-startup/content/DevToolsShim.sys.mjs': typeof import('chrome://devtools-startup/content/DevToolsShim.sys.mjs');
+  'chrome://global/content/ml/EngineProcess.sys.mjs': typeof import('chrome://global/content/ml/EngineProcess.sys.mjs');
+  'chrome://global/content/ml/HttpInference.sys.mjs': typeof import('chrome://global/content/ml/HttpInference.sys.mjs');
+  'chrome://global/content/ml/ModelHub.sys.mjs': typeof import('chrome://global/content/ml/ModelHub.sys.mjs');
+  'chrome://global/content/ml/Utils.sys.mjs': typeof import('chrome://global/content/ml/Utils.sys.mjs');
+  'chrome://global/content/ml/backends/LlamaPipeline.mjs': typeof import('chrome://global/content/ml/backends/LlamaPipeline.mjs');
+  'chrome://global/content/ml/backends/ONNXPipeline.mjs': typeof import('chrome://global/content/ml/backends/ONNXPipeline.mjs');
+  'chrome://global/content/ml/backends/Pipeline.mjs': typeof import('chrome://global/content/ml/backends/Pipeline.mjs');
+  'chrome://global/content/shopping/ProductValidator.sys.mjs': typeof import('chrome://global/content/shopping/ProductValidator.sys.mjs');
+  'chrome://global/content/shopping/ShoppingProduct.mjs': typeof import('chrome://global/content/shopping/ShoppingProduct.mjs');
+  'chrome://global/content/translations/TranslationsTelemetry.sys.mjs': typeof import('chrome://global/content/translations/TranslationsTelemetry.sys.mjs');
+  'chrome://global/content/translations/TranslationsUtils.mjs': typeof import('chrome://global/content/translations/TranslationsUtils.mjs');
+  'chrome://global/content/translations/translations-document.sys.mjs': typeof import('chrome://global/content/translations/translations-document.sys.mjs');
+  'chrome://global/content/translations/translations-engine.sys.mjs': typeof import('chrome://global/content/translations/translations-engine.sys.mjs');
+  'chrome://mochitests/content/browser/remote/shared/messagehandler/test/browser/resources/modules/ModuleRegistry.sys.mjs': typeof import('chrome://mochitests/content/browser/remote/shared/messagehandler/test/browser/resources/modules/ModuleRegistry.sys.mjs');
+  'chrome://pocket/content/Pocket.sys.mjs': typeof import('chrome://pocket/content/Pocket.sys.mjs');
+  'chrome://pocket/content/SaveToPocket.sys.mjs': typeof import('chrome://pocket/content/SaveToPocket.sys.mjs');
+  'chrome://pocket/content/pktApi.sys.mjs': typeof import('chrome://pocket/content/pktApi.sys.mjs');
+  'chrome://pocket/content/pktTelemetry.sys.mjs': typeof import('chrome://pocket/content/pktTelemetry.sys.mjs');
+  'chrome://remote/content/cdp/CDP.sys.mjs': typeof import('chrome://remote/content/cdp/CDP.sys.mjs');
+  'chrome://remote/content/cdp/CDPConnection.sys.mjs': typeof import('chrome://remote/content/cdp/CDPConnection.sys.mjs');
+  'chrome://remote/content/cdp/Error.sys.mjs': typeof import('chrome://remote/content/cdp/Error.sys.mjs');
+  'chrome://remote/content/cdp/JSONHandler.sys.mjs': typeof import('chrome://remote/content/cdp/JSONHandler.sys.mjs');
+  'chrome://remote/content/cdp/Protocol.sys.mjs': typeof import('chrome://remote/content/cdp/Protocol.sys.mjs');
+  'chrome://remote/content/cdp/StreamRegistry.sys.mjs': typeof import('chrome://remote/content/cdp/StreamRegistry.sys.mjs');
+  'chrome://remote/content/cdp/domains/ContentProcessDomains.sys.mjs': typeof import('chrome://remote/content/cdp/domains/ContentProcessDomains.sys.mjs');
+  'chrome://remote/content/cdp/domains/Domain.sys.mjs': typeof import('chrome://remote/content/cdp/domains/Domain.sys.mjs');
+  'chrome://remote/content/cdp/domains/DomainCache.sys.mjs': typeof import('chrome://remote/content/cdp/domains/DomainCache.sys.mjs');
+  'chrome://remote/content/cdp/domains/ParentProcessDomains.sys.mjs': typeof import('chrome://remote/content/cdp/domains/ParentProcessDomains.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/DOM.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/DOM.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Emulation.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Emulation.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Input.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Input.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Log.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Log.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Network.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Network.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Page.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Page.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Performance.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Performance.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Runtime.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Runtime.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/Security.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/Security.sys.mjs');
+  'chrome://remote/content/cdp/domains/content/runtime/ExecutionContext.sys.mjs': typeof import('chrome://remote/content/cdp/domains/content/runtime/ExecutionContext.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Browser.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Browser.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Emulation.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Emulation.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Fetch.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Fetch.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/IO.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/IO.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Input.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Input.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Network.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Network.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Page.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Page.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Security.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Security.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/SystemInfo.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/SystemInfo.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/Target.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/Target.sys.mjs');
+  'chrome://remote/content/cdp/domains/parent/page/DialogHandler.sys.mjs': typeof import('chrome://remote/content/cdp/domains/parent/page/DialogHandler.sys.mjs');
+  'chrome://remote/content/cdp/observers/ChannelEventSink.sys.mjs': typeof import('chrome://remote/content/cdp/observers/ChannelEventSink.sys.mjs');
+  'chrome://remote/content/cdp/observers/ContextObserver.sys.mjs': typeof import('chrome://remote/content/cdp/observers/ContextObserver.sys.mjs');
+  'chrome://remote/content/cdp/observers/NetworkObserver.sys.mjs': typeof import('chrome://remote/content/cdp/observers/NetworkObserver.sys.mjs');
+  'chrome://remote/content/cdp/observers/TargetObserver.sys.mjs': typeof import('chrome://remote/content/cdp/observers/TargetObserver.sys.mjs');
+  'chrome://remote/content/cdp/sessions/MainProcessSession.sys.mjs': typeof import('chrome://remote/content/cdp/sessions/MainProcessSession.sys.mjs');
+  'chrome://remote/content/cdp/sessions/TabSession.sys.mjs': typeof import('chrome://remote/content/cdp/sessions/TabSession.sys.mjs');
+  'chrome://remote/content/cdp/targets/MainProcessTarget.sys.mjs': typeof import('chrome://remote/content/cdp/targets/MainProcessTarget.sys.mjs');
+  'chrome://remote/content/cdp/targets/TabTarget.sys.mjs': typeof import('chrome://remote/content/cdp/targets/TabTarget.sys.mjs');
+  'chrome://remote/content/cdp/targets/TargetList.sys.mjs': typeof import('chrome://remote/content/cdp/targets/TargetList.sys.mjs');
+  'chrome://remote/content/components/Marionette.sys.mjs': typeof import('chrome://remote/content/components/Marionette.sys.mjs');
+  'chrome://remote/content/components/RemoteAgent.sys.mjs': typeof import('chrome://remote/content/components/RemoteAgent.sys.mjs');
+  'chrome://remote/content/marionette/actors/MarionetteCommandsParent.sys.mjs': typeof import('chrome://remote/content/marionette/actors/MarionetteCommandsParent.sys.mjs');
+  'chrome://remote/content/marionette/actors/MarionetteEventsParent.sys.mjs': typeof import('chrome://remote/content/marionette/actors/MarionetteEventsParent.sys.mjs');
+  'chrome://remote/content/marionette/atom.sys.mjs': typeof import('chrome://remote/content/marionette/atom.sys.mjs');
+  'chrome://remote/content/marionette/browser.sys.mjs': typeof import('chrome://remote/content/marionette/browser.sys.mjs');
+  'chrome://remote/content/marionette/cert.sys.mjs': typeof import('chrome://remote/content/marionette/cert.sys.mjs');
+  'chrome://remote/content/marionette/cookie.sys.mjs': typeof import('chrome://remote/content/marionette/cookie.sys.mjs');
+  'chrome://remote/content/marionette/driver.sys.mjs': typeof import('chrome://remote/content/marionette/driver.sys.mjs');
+  'chrome://remote/content/marionette/evaluate.sys.mjs': typeof import('chrome://remote/content/marionette/evaluate.sys.mjs');
+  'chrome://remote/content/marionette/interaction.sys.mjs': typeof import('chrome://remote/content/marionette/interaction.sys.mjs');
+  'chrome://remote/content/marionette/json.sys.mjs': typeof import('chrome://remote/content/marionette/json.sys.mjs');
+  'chrome://remote/content/marionette/l10n.sys.mjs': typeof import('chrome://remote/content/marionette/l10n.sys.mjs');
+  'chrome://remote/content/marionette/message.sys.mjs': typeof import('chrome://remote/content/marionette/message.sys.mjs');
+  'chrome://remote/content/marionette/navigate.sys.mjs': typeof import('chrome://remote/content/marionette/navigate.sys.mjs');
+  'chrome://remote/content/marionette/packets.sys.mjs': typeof import('chrome://remote/content/marionette/packets.sys.mjs');
+  'chrome://remote/content/marionette/prefs.sys.mjs': typeof import('chrome://remote/content/marionette/prefs.sys.mjs');
+  'chrome://remote/content/marionette/reftest.sys.mjs': typeof import('chrome://remote/content/marionette/reftest.sys.mjs');
+  'chrome://remote/content/marionette/server.sys.mjs': typeof import('chrome://remote/content/marionette/server.sys.mjs');
+  'chrome://remote/content/marionette/stream-utils.sys.mjs': typeof import('chrome://remote/content/marionette/stream-utils.sys.mjs');
+  'chrome://remote/content/marionette/sync.sys.mjs': typeof import('chrome://remote/content/marionette/sync.sys.mjs');
+  'chrome://remote/content/marionette/transport.sys.mjs': typeof import('chrome://remote/content/marionette/transport.sys.mjs');
+  'chrome://remote/content/marionette/web-reference.sys.mjs': typeof import('chrome://remote/content/marionette/web-reference.sys.mjs');
+  'chrome://remote/content/marionette/webauthn.sys.mjs': typeof import('chrome://remote/content/marionette/webauthn.sys.mjs');
+  'chrome://remote/content/server/WebSocketHandshake.sys.mjs': typeof import('chrome://remote/content/server/WebSocketHandshake.sys.mjs');
+  'chrome://remote/content/server/WebSocketTransport.sys.mjs': typeof import('chrome://remote/content/server/WebSocketTransport.sys.mjs');
+  'chrome://remote/content/server/httpd.sys.mjs': typeof import('chrome://remote/content/server/httpd.sys.mjs');
+  'chrome://remote/content/shared/Addon.sys.mjs': typeof import('chrome://remote/content/shared/Addon.sys.mjs');
+  'chrome://remote/content/shared/AppInfo.sys.mjs': typeof import('chrome://remote/content/shared/AppInfo.sys.mjs');
+  'chrome://remote/content/shared/AsyncQueue.sys.mjs': typeof import('chrome://remote/content/shared/AsyncQueue.sys.mjs');
+  'chrome://remote/content/shared/Browser.sys.mjs': typeof import('chrome://remote/content/shared/Browser.sys.mjs');
+  'chrome://remote/content/shared/Capture.sys.mjs': typeof import('chrome://remote/content/shared/Capture.sys.mjs');
+  'chrome://remote/content/shared/ChallengeHeaderParser.sys.mjs': typeof import('chrome://remote/content/shared/ChallengeHeaderParser.sys.mjs');
+  'chrome://remote/content/shared/DOM.sys.mjs': typeof import('chrome://remote/content/shared/DOM.sys.mjs');
+  'chrome://remote/content/shared/Format.sys.mjs': typeof import('chrome://remote/content/shared/Format.sys.mjs');
+  'chrome://remote/content/shared/Log.sys.mjs': typeof import('chrome://remote/content/shared/Log.sys.mjs');
+  'chrome://remote/content/shared/MobileTabBrowser.sys.mjs': typeof import('chrome://remote/content/shared/MobileTabBrowser.sys.mjs');
+  'chrome://remote/content/shared/Navigate.sys.mjs': typeof import('chrome://remote/content/shared/Navigate.sys.mjs');
+  'chrome://remote/content/shared/NavigationManager.sys.mjs': typeof import('chrome://remote/content/shared/NavigationManager.sys.mjs');
+  'chrome://remote/content/shared/NetworkCacheManager.sys.mjs': typeof import('chrome://remote/content/shared/NetworkCacheManager.sys.mjs');
+  'chrome://remote/content/shared/NetworkDecodedBodySizeMap.sys.mjs': typeof import('chrome://remote/content/shared/NetworkDecodedBodySizeMap.sys.mjs');
+  'chrome://remote/content/shared/NetworkRequest.sys.mjs': typeof import('chrome://remote/content/shared/NetworkRequest.sys.mjs');
+  'chrome://remote/content/shared/NetworkResponse.sys.mjs': typeof import('chrome://remote/content/shared/NetworkResponse.sys.mjs');
+  'chrome://remote/content/shared/PDF.sys.mjs': typeof import('chrome://remote/content/shared/PDF.sys.mjs');
+  'chrome://remote/content/shared/Permissions.sys.mjs': typeof import('chrome://remote/content/shared/Permissions.sys.mjs');
+  'chrome://remote/content/shared/Prompt.sys.mjs': typeof import('chrome://remote/content/shared/Prompt.sys.mjs');
+  'chrome://remote/content/shared/Realm.sys.mjs': typeof import('chrome://remote/content/shared/Realm.sys.mjs');
+  'chrome://remote/content/shared/RecommendedPreferences.sys.mjs': typeof import('chrome://remote/content/shared/RecommendedPreferences.sys.mjs');
+  'chrome://remote/content/shared/Stack.sys.mjs': typeof import('chrome://remote/content/shared/Stack.sys.mjs');
+  'chrome://remote/content/shared/Sync.sys.mjs': typeof import('chrome://remote/content/shared/Sync.sys.mjs');
+  'chrome://remote/content/shared/TabManager.sys.mjs': typeof import('chrome://remote/content/shared/TabManager.sys.mjs');
+  'chrome://remote/content/shared/UUID.sys.mjs': typeof import('chrome://remote/content/shared/UUID.sys.mjs');
+  'chrome://remote/content/shared/UserContextManager.sys.mjs': typeof import('chrome://remote/content/shared/UserContextManager.sys.mjs');
+  'chrome://remote/content/shared/WindowManager.sys.mjs': typeof import('chrome://remote/content/shared/WindowManager.sys.mjs');
+  'chrome://remote/content/shared/js-window-actors/NavigationListenerActor.sys.mjs': typeof import('chrome://remote/content/shared/js-window-actors/NavigationListenerActor.sys.mjs');
+  'chrome://remote/content/shared/listeners/BeforeStopRequestListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/BeforeStopRequestListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/BrowsingContextListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/BrowsingContextListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/CachedResourceListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/CachedResourceListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/ConsoleAPIListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/ConsoleAPIListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/ConsoleListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/ConsoleListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/ContextualIdentityListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/ContextualIdentityListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/LoadListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/LoadListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/NavigationListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/NavigationListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/NetworkEventRecord.sys.mjs': typeof import('chrome://remote/content/shared/listeners/NetworkEventRecord.sys.mjs');
+  'chrome://remote/content/shared/listeners/NetworkListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/NetworkListener.sys.mjs');
+  'chrome://remote/content/shared/listeners/PromptListener.sys.mjs': typeof import('chrome://remote/content/shared/listeners/PromptListener.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/Errors.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/Errors.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/EventsDispatcher.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/EventsDispatcher.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/MessageHandler.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/MessageHandler.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/MessageHandlerRegistry.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/MessageHandlerRegistry.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/ModuleCache.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/ModuleCache.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/RootMessageHandler.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/RootMessageHandler.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/RootMessageHandlerRegistry.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/RootMessageHandlerRegistry.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/WindowGlobalMessageHandler.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/WindowGlobalMessageHandler.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/sessiondata/SessionData.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/sessiondata/SessionData.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/sessiondata/SessionDataReader.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/sessiondata/SessionDataReader.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/transports/BrowsingContextUtils.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/transports/BrowsingContextUtils.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/transports/RootTransport.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/transports/RootTransport.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/transports/js-window-actors/MessageHandlerFrameActor.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/transports/js-window-actors/MessageHandlerFrameActor.sys.mjs');
+  'chrome://remote/content/shared/messagehandler/transports/js-window-actors/MessageHandlerFrameChild.sys.mjs': typeof import('chrome://remote/content/shared/messagehandler/transports/js-window-actors/MessageHandlerFrameChild.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Accessibility.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Accessibility.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Actions.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Actions.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Assert.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Assert.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Capabilities.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Capabilities.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Errors.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Errors.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Event.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Event.sys.mjs');
+  'chrome://remote/content/shared/webdriver/KeyData.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/KeyData.sys.mjs');
+  'chrome://remote/content/shared/webdriver/NodeCache.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/NodeCache.sys.mjs');
+  'chrome://remote/content/shared/webdriver/Session.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/Session.sys.mjs');
+  'chrome://remote/content/shared/webdriver/URLPattern.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/URLPattern.sys.mjs');
+  'chrome://remote/content/shared/webdriver/UserPromptHandler.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/UserPromptHandler.sys.mjs');
+  'chrome://remote/content/shared/webdriver/process-actors/WebDriverProcessDataParent.sys.mjs': typeof import('chrome://remote/content/shared/webdriver/process-actors/WebDriverProcessDataParent.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/NewSessionHandler.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/NewSessionHandler.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/RemoteValue.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/RemoteValue.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/WebDriverBiDi.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/WebDriverBiDi.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/WebDriverBiDiConnection.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/WebDriverBiDiConnection.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/Intercept.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/Intercept.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/ModuleRegistry.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/ModuleRegistry.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/browser.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/browser.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/browsingContext.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/browsingContext.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/input.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/input.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/log.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/log.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/network.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/network.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/permissions.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/permissions.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/script.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/script.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/session.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/session.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/storage.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/storage.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/root/webExtension.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/root/webExtension.sys.mjs');
+  'chrome://remote/content/webdriver-bidi/modules/windowglobal-in-root/browsingContext.sys.mjs': typeof import('chrome://remote/content/webdriver-bidi/modules/windowglobal-in-root/browsingContext.sys.mjs');
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+  'resource://gre/modules/shared/LoginFormFactory.sys.mjs': typeof import('resource://gre/modules/shared/LoginFormFactory.sys.mjs');
+  'resource://gre/modules/shared/PasswordGenerator.sys.mjs': typeof import('resource://gre/modules/shared/PasswordGenerator.sys.mjs');
+  'resource://gre/modules/shared/PasswordRulesParser.sys.mjs': typeof import('resource://gre/modules/shared/PasswordRulesParser.sys.mjs');
+  'resource://gre/modules/shared/PhoneNumber.sys.mjs': typeof import('resource://gre/modules/shared/PhoneNumber.sys.mjs');
+  'resource://gre/modules/shared/PhoneNumberNormalizer.sys.mjs': typeof import('resource://gre/modules/shared/PhoneNumberNormalizer.sys.mjs');
+  'resource://gre/modules/subprocess/subprocess_unix.sys.mjs': typeof import('resource://gre/modules/subprocess/subprocess_unix.sys.mjs');
+  'resource://gre/modules/subprocess/subprocess_win.sys.mjs': typeof import('resource://gre/modules/subprocess/subprocess_win.sys.mjs');
+  'resource://gre/modules/translations/LanguageDetector.sys.mjs': typeof import('resource://gre/modules/translations/LanguageDetector.sys.mjs');
+  'resource://gre/modules/workers/PromiseWorker.mjs': typeof import('resource://gre/modules/workers/PromiseWorker.mjs');
+  'resource://messaging-system/lib/SpecialMessageActions.sys.mjs': typeof import('resource://messaging-system/lib/SpecialMessageActions.sys.mjs');
+  'resource://messaging-system/targeting/Targeting.sys.mjs': typeof import('resource://messaging-system/targeting/Targeting.sys.mjs');
+  'resource://mozscreenshots/Screenshot.sys.mjs': typeof import('resource://mozscreenshots/Screenshot.sys.mjs');
+  'resource://newtab/common/Actions.mjs': typeof import('resource://newtab/common/Actions.mjs');
+  'resource://newtab/lib/AboutPreferences.sys.mjs': typeof import('resource://newtab/lib/AboutPreferences.sys.mjs');
+  'resource://newtab/lib/ActivityStream.sys.mjs': typeof import('resource://newtab/lib/ActivityStream.sys.mjs');
+  'resource://newtab/lib/ActivityStreamMessageChannel.sys.mjs': typeof import('resource://newtab/lib/ActivityStreamMessageChannel.sys.mjs');
+  'resource://newtab/lib/ActivityStreamPrefs.sys.mjs': typeof import('resource://newtab/lib/ActivityStreamPrefs.sys.mjs');
+  'resource://newtab/lib/AdsFeed.sys.mjs': typeof import('resource://newtab/lib/AdsFeed.sys.mjs');
+  'resource://newtab/lib/DefaultSites.sys.mjs': typeof import('resource://newtab/lib/DefaultSites.sys.mjs');
+  'resource://newtab/lib/DiscoveryStreamFeed.sys.mjs': typeof import('resource://newtab/lib/DiscoveryStreamFeed.sys.mjs');
+  'resource://newtab/lib/DownloadsManager.sys.mjs': typeof import('resource://newtab/lib/DownloadsManager.sys.mjs');
+  'resource://newtab/lib/FaviconFeed.sys.mjs': typeof import('resource://newtab/lib/FaviconFeed.sys.mjs');
+  'resource://newtab/lib/HighlightsFeed.sys.mjs': typeof import('resource://newtab/lib/HighlightsFeed.sys.mjs');
+  'resource://newtab/lib/NewTabInit.sys.mjs': typeof import('resource://newtab/lib/NewTabInit.sys.mjs');
+  'resource://newtab/lib/PersistentCache.sys.mjs': typeof import('resource://newtab/lib/PersistentCache.sys.mjs');
+  'resource://newtab/lib/PersonalityProvider/PersonalityProvider.sys.mjs': typeof import('resource://newtab/lib/PersonalityProvider/PersonalityProvider.sys.mjs');
+  'resource://newtab/lib/PlacesFeed.sys.mjs': typeof import('resource://newtab/lib/PlacesFeed.sys.mjs');
+  'resource://newtab/lib/PrefsFeed.sys.mjs': typeof import('resource://newtab/lib/PrefsFeed.sys.mjs');
+  'resource://newtab/lib/RecommendationProvider.sys.mjs': typeof import('resource://newtab/lib/RecommendationProvider.sys.mjs');
+  'resource://newtab/lib/Screenshots.sys.mjs': typeof import('resource://newtab/lib/Screenshots.sys.mjs');
+  'resource://newtab/lib/SectionsManager.sys.mjs': typeof import('resource://newtab/lib/SectionsManager.sys.mjs');
+  'resource://newtab/lib/Store.sys.mjs': typeof import('resource://newtab/lib/Store.sys.mjs');
+  'resource://newtab/lib/SystemTickFeed.sys.mjs': typeof import('resource://newtab/lib/SystemTickFeed.sys.mjs');
+  'resource://newtab/lib/TelemetryFeed.sys.mjs': typeof import('resource://newtab/lib/TelemetryFeed.sys.mjs');
+  'resource://newtab/lib/TopSitesFeed.sys.mjs': typeof import('resource://newtab/lib/TopSitesFeed.sys.mjs');
+  'resource://newtab/lib/TopStoriesFeed.sys.mjs': typeof import('resource://newtab/lib/TopStoriesFeed.sys.mjs');
+  'resource://newtab/lib/UTEventReporting.sys.mjs': typeof import('resource://newtab/lib/UTEventReporting.sys.mjs');
+  'resource://newtab/lib/WallpaperFeed.sys.mjs': typeof import('resource://newtab/lib/WallpaperFeed.sys.mjs');
+  'resource://newtab/lib/WeatherFeed.sys.mjs': typeof import('resource://newtab/lib/WeatherFeed.sys.mjs');
+  'resource://nimbus/ExperimentAPI.sys.mjs': typeof import('resource://nimbus/ExperimentAPI.sys.mjs');
+  'resource://nimbus/FeatureManifest.sys.mjs': typeof import('resource://nimbus/FeatureManifest.sys.mjs');
+  'resource://nimbus/FirefoxLabs.sys.mjs': typeof import('resource://nimbus/FirefoxLabs.sys.mjs');
+  'resource://nimbus/lib/ExperimentManager.sys.mjs': typeof import('resource://nimbus/lib/ExperimentManager.sys.mjs');
+  'resource://nimbus/lib/ExperimentStore.sys.mjs': typeof import('resource://nimbus/lib/ExperimentStore.sys.mjs');
+  'resource://nimbus/lib/Migrations.sys.mjs': typeof import('resource://nimbus/lib/Migrations.sys.mjs');
+  'resource://nimbus/lib/RemoteSettingsExperimentLoader.sys.mjs': typeof import('resource://nimbus/lib/RemoteSettingsExperimentLoader.sys.mjs');
+  'resource://nimbus/lib/TargetingContextRecorder.sys.mjs': typeof import('resource://nimbus/lib/TargetingContextRecorder.sys.mjs');
+  'resource://normandy-content/AboutPages.sys.mjs': typeof import('resource://normandy-content/AboutPages.sys.mjs');
+  'resource://normandy/Normandy.sys.mjs': typeof import('resource://normandy/Normandy.sys.mjs');
+  'resource://normandy/NormandyMigrations.sys.mjs': typeof import('resource://normandy/NormandyMigrations.sys.mjs');
+  'resource://normandy/actions/AddonRollbackAction.sys.mjs': typeof import('resource://normandy/actions/AddonRollbackAction.sys.mjs');
+  'resource://normandy/actions/AddonRolloutAction.sys.mjs': typeof import('resource://normandy/actions/AddonRolloutAction.sys.mjs');
+  'resource://normandy/actions/BaseAction.sys.mjs': typeof import('resource://normandy/actions/BaseAction.sys.mjs');
+  'resource://normandy/actions/BranchedAddonStudyAction.sys.mjs': typeof import('resource://normandy/actions/BranchedAddonStudyAction.sys.mjs');
+  'resource://normandy/actions/ConsoleLogAction.sys.mjs': typeof import('resource://normandy/actions/ConsoleLogAction.sys.mjs');
+  'resource://normandy/actions/MessagingExperimentAction.sys.mjs': typeof import('resource://normandy/actions/MessagingExperimentAction.sys.mjs');
+  'resource://normandy/actions/PreferenceExperimentAction.sys.mjs': typeof import('resource://normandy/actions/PreferenceExperimentAction.sys.mjs');
+  'resource://normandy/actions/PreferenceRollbackAction.sys.mjs': typeof import('resource://normandy/actions/PreferenceRollbackAction.sys.mjs');
+  'resource://normandy/actions/PreferenceRolloutAction.sys.mjs': typeof import('resource://normandy/actions/PreferenceRolloutAction.sys.mjs');
+  'resource://normandy/actions/ShowHeartbeatAction.sys.mjs': typeof import('resource://normandy/actions/ShowHeartbeatAction.sys.mjs');
+  'resource://normandy/actions/schemas/index.sys.mjs': typeof import('resource://normandy/actions/schemas/index.sys.mjs');
+  'resource://normandy/lib/ActionsManager.sys.mjs': typeof import('resource://normandy/lib/ActionsManager.sys.mjs');
+  'resource://normandy/lib/AddonRollouts.sys.mjs': typeof import('resource://normandy/lib/AddonRollouts.sys.mjs');
+  'resource://normandy/lib/AddonStudies.sys.mjs': typeof import('resource://normandy/lib/AddonStudies.sys.mjs');
+  'resource://normandy/lib/CleanupManager.sys.mjs': typeof import('resource://normandy/lib/CleanupManager.sys.mjs');
+  'resource://normandy/lib/ClientEnvironment.sys.mjs': typeof import('resource://normandy/lib/ClientEnvironment.sys.mjs');
+  'resource://normandy/lib/Heartbeat.sys.mjs': typeof import('resource://normandy/lib/Heartbeat.sys.mjs');
+  'resource://normandy/lib/LegacyHeartbeat.sys.mjs': typeof import('resource://normandy/lib/LegacyHeartbeat.sys.mjs');
+  'resource://normandy/lib/LogManager.sys.mjs': typeof import('resource://normandy/lib/LogManager.sys.mjs');
+  'resource://normandy/lib/NormandyAddonManager.sys.mjs': typeof import('resource://normandy/lib/NormandyAddonManager.sys.mjs');
+  'resource://normandy/lib/NormandyApi.sys.mjs': typeof import('resource://normandy/lib/NormandyApi.sys.mjs');
+  'resource://normandy/lib/NormandyUtils.sys.mjs': typeof import('resource://normandy/lib/NormandyUtils.sys.mjs');
+  'resource://normandy/lib/PrefUtils.sys.mjs': typeof import('resource://normandy/lib/PrefUtils.sys.mjs');
+  'resource://normandy/lib/PreferenceExperiments.sys.mjs': typeof import('resource://normandy/lib/PreferenceExperiments.sys.mjs');
+  'resource://normandy/lib/PreferenceRollouts.sys.mjs': typeof import('resource://normandy/lib/PreferenceRollouts.sys.mjs');
+  'resource://normandy/lib/RecipeRunner.sys.mjs': typeof import('resource://normandy/lib/RecipeRunner.sys.mjs');
+  'resource://normandy/lib/ShieldPreferences.sys.mjs': typeof import('resource://normandy/lib/ShieldPreferences.sys.mjs');
+  'resource://normandy/lib/Storage.sys.mjs': typeof import('resource://normandy/lib/Storage.sys.mjs');
+  'resource://normandy/lib/TelemetryEvents.sys.mjs': typeof import('resource://normandy/lib/TelemetryEvents.sys.mjs');
+  'resource://normandy/lib/Uptake.sys.mjs': typeof import('resource://normandy/lib/Uptake.sys.mjs');
+  'resource://pdf.js/PdfJs.sys.mjs': typeof import('resource://pdf.js/PdfJs.sys.mjs');
+  'resource://pdf.js/PdfJsNetwork.sys.mjs': typeof import('resource://pdf.js/PdfJsNetwork.sys.mjs');
+  'resource://pdf.js/PdfJsTelemetry.sys.mjs': typeof import('resource://pdf.js/PdfJsTelemetry.sys.mjs');
+  'resource://pdf.js/PdfSandbox.sys.mjs': typeof import('resource://pdf.js/PdfSandbox.sys.mjs');
+  'resource://pdf.js/PdfStreamConverter.sys.mjs': typeof import('resource://pdf.js/PdfStreamConverter.sys.mjs');
+  'resource://services-common/async.sys.mjs': typeof import('resource://services-common/async.sys.mjs');
+  'resource://services-common/kinto-http-client.sys.mjs': typeof import('resource://services-common/kinto-http-client.sys.mjs');
+  'resource://services-common/kinto-offline-client.sys.mjs': typeof import('resource://services-common/kinto-offline-client.sys.mjs');
+  'resource://services-common/kinto-storage-adapter.sys.mjs': typeof import('resource://services-common/kinto-storage-adapter.sys.mjs');
+  'resource://services-common/observers.sys.mjs': typeof import('resource://services-common/observers.sys.mjs');
+  'resource://services-common/uptake-telemetry.sys.mjs': typeof import('resource://services-common/uptake-telemetry.sys.mjs');
+  'resource://services-common/utils.sys.mjs': typeof import('resource://services-common/utils.sys.mjs');
+  'resource://services-crypto/jwcrypto.sys.mjs': typeof import('resource://services-crypto/jwcrypto.sys.mjs');
+  'resource://services-crypto/utils.sys.mjs': typeof import('resource://services-crypto/utils.sys.mjs');
+  'resource://services-settings/Attachments.sys.mjs': typeof import('resource://services-settings/Attachments.sys.mjs');
+  'resource://services-settings/Database.sys.mjs': typeof import('resource://services-settings/Database.sys.mjs');
+  'resource://services-settings/IDBHelpers.sys.mjs': typeof import('resource://services-settings/IDBHelpers.sys.mjs');
+  'resource://services-settings/RemoteSettingsClient.sys.mjs': typeof import('resource://services-settings/RemoteSettingsClient.sys.mjs');
+  'resource://services-settings/RemoteSettingsWorker.sys.mjs': typeof import('resource://services-settings/RemoteSettingsWorker.sys.mjs');
+  'resource://services-settings/SharedUtils.sys.mjs': typeof import('resource://services-settings/SharedUtils.sys.mjs');
+  'resource://services-settings/SyncHistory.sys.mjs': typeof import('resource://services-settings/SyncHistory.sys.mjs');
+  'resource://services-settings/Utils.sys.mjs': typeof import('resource://services-settings/Utils.sys.mjs');
+  'resource://services-settings/remote-settings.sys.mjs': typeof import('resource://services-settings/remote-settings.sys.mjs');
+  'resource://services-sync/SyncedTabs.sys.mjs': typeof import('resource://services-sync/SyncedTabs.sys.mjs');
+  'resource://services-sync/TabsStore.sys.mjs': typeof import('resource://services-sync/TabsStore.sys.mjs');
+  'resource://services-sync/UIState.sys.mjs': typeof import('resource://services-sync/UIState.sys.mjs');
+  'resource://services-sync/constants.sys.mjs': typeof import('resource://services-sync/constants.sys.mjs');
+  'resource://services-sync/doctor.sys.mjs': typeof import('resource://services-sync/doctor.sys.mjs');
+  'resource://services-sync/engines/addons.sys.mjs': typeof import('resource://services-sync/engines/addons.sys.mjs');
+  'resource://services-sync/engines/forms.sys.mjs': typeof import('resource://services-sync/engines/forms.sys.mjs');
+  'resource://services-sync/engines/passwords.sys.mjs': typeof import('resource://services-sync/engines/passwords.sys.mjs');
+  'resource://services-sync/keys.sys.mjs': typeof import('resource://services-sync/keys.sys.mjs');
+  'resource://services-sync/main.sys.mjs': typeof import('resource://services-sync/main.sys.mjs');
+  'resource://services-sync/record.sys.mjs': typeof import('resource://services-sync/record.sys.mjs');
+  'resource://services-sync/resource.sys.mjs': typeof import('resource://services-sync/resource.sys.mjs');
+  'resource://services-sync/service.sys.mjs': typeof import('resource://services-sync/service.sys.mjs');
+  'resource://services-sync/status.sys.mjs': typeof import('resource://services-sync/status.sys.mjs');
+  'resource://services-sync/sync_auth.sys.mjs': typeof import('resource://services-sync/sync_auth.sys.mjs');
+  'resource://services-sync/telemetry.sys.mjs': typeof import('resource://services-sync/telemetry.sys.mjs');
+  'resource://services-sync/util.sys.mjs': typeof import('resource://services-sync/util.sys.mjs');
+  'resource://talos-powers/TalosParentProfiler.sys.mjs': typeof import('resource://talos-powers/TalosParentProfiler.sys.mjs');
+  'resource://test/es6module_devtoolsLoader.js': typeof import('resource://test/es6module_devtoolsLoader.js');
+  'resource://test/esm_lazy-1.sys.mjs': typeof import('resource://test/esm_lazy-1.sys.mjs');
+  'resource://test/esm_lazy-2.sys.mjs': typeof import('resource://test/esm_lazy-2.sys.mjs');
+  'resource://test/esmified-1.sys.mjs': typeof import('resource://test/esmified-1.sys.mjs');
+  'resource://testing-common/AddonTestUtils.sys.mjs': typeof import('resource://testing-common/AddonTestUtils.sys.mjs');
+  'resource://testing-common/AppInfo.sys.mjs': typeof import('resource://testing-common/AppInfo.sys.mjs');
+  'resource://testing-common/AppUiTestDelegate.sys.mjs': typeof import('resource://testing-common/AppUiTestDelegate.sys.mjs');
+  'resource://testing-common/Assert.sys.mjs': typeof import('resource://testing-common/Assert.sys.mjs');
+  'resource://testing-common/BrowserTestUtils.sys.mjs': typeof import('resource://testing-common/BrowserTestUtils.sys.mjs');
+  'resource://testing-common/ContentTask.sys.mjs': typeof import('resource://testing-common/ContentTask.sys.mjs');
+  'resource://testing-common/ContentTaskUtils.sys.mjs': typeof import('resource://testing-common/ContentTaskUtils.sys.mjs');
+  'resource://testing-common/CustomizableUITestUtils.sys.mjs': typeof import('resource://testing-common/CustomizableUITestUtils.sys.mjs');
+  'resource://testing-common/DoHTestUtils.sys.mjs': typeof import('resource://testing-common/DoHTestUtils.sys.mjs');
+  'resource://testing-common/EnterprisePolicyTesting.sys.mjs': typeof import('resource://testing-common/EnterprisePolicyTesting.sys.mjs');
+  'resource://testing-common/ExtensionTestCommon.sys.mjs': typeof import('resource://testing-common/ExtensionTestCommon.sys.mjs');
+  'resource://testing-common/ExtensionXPCShellUtils.sys.mjs': typeof import('resource://testing-common/ExtensionXPCShellUtils.sys.mjs');
+  'resource://testing-common/FileTestUtils.sys.mjs': typeof import('resource://testing-common/FileTestUtils.sys.mjs');
+  'resource://testing-common/FormHistoryTestUtils.sys.mjs': typeof import('resource://testing-common/FormHistoryTestUtils.sys.mjs');
+  'resource://testing-common/MerinoTestUtils.sys.mjs': typeof import('resource://testing-common/MerinoTestUtils.sys.mjs');
+  'resource://testing-common/MessageChannel.sys.mjs': typeof import('resource://testing-common/MessageChannel.sys.mjs');
+  'resource://testing-common/MockColorPicker.sys.mjs': typeof import('resource://testing-common/MockColorPicker.sys.mjs');
+  'resource://testing-common/MockFilePicker.sys.mjs': typeof import('resource://testing-common/MockFilePicker.sys.mjs');
+  'resource://testing-common/MockPermissionPrompt.sys.mjs': typeof import('resource://testing-common/MockPermissionPrompt.sys.mjs');
+  'resource://testing-common/MockPromptCollection.sys.mjs': typeof import('resource://testing-common/MockPromptCollection.sys.mjs');
+  'resource://testing-common/MockRegistrar.sys.mjs': typeof import('resource://testing-common/MockRegistrar.sys.mjs');
+  'resource://testing-common/MockRegistry.sys.mjs': typeof import('resource://testing-common/MockRegistry.sys.mjs');
+  'resource://testing-common/MockSound.sys.mjs': typeof import('resource://testing-common/MockSound.sys.mjs');
+  'resource://testing-common/NimbusTestUtils.sys.mjs': typeof import('resource://testing-common/NimbusTestUtils.sys.mjs');
+  'resource://testing-common/NormandyTestUtils.sys.mjs': typeof import('resource://testing-common/NormandyTestUtils.sys.mjs');
+  'resource://testing-common/PerTestCoverageUtils.sys.mjs': typeof import('resource://testing-common/PerTestCoverageUtils.sys.mjs');
+  'resource://testing-common/PerfTestHelpers.sys.mjs': typeof import('resource://testing-common/PerfTestHelpers.sys.mjs');
+  'resource://testing-common/PermissionTestUtils.sys.mjs': typeof import('resource://testing-common/PermissionTestUtils.sys.mjs');
+  'resource://testing-common/PlacesTestUtils.sys.mjs': typeof import('resource://testing-common/PlacesTestUtils.sys.mjs');
+  'resource://testing-common/PromiseTestUtils.sys.mjs': typeof import('resource://testing-common/PromiseTestUtils.sys.mjs');
+  'resource://testing-common/PromptTestUtils.sys.mjs': typeof import('resource://testing-common/PromptTestUtils.sys.mjs');
+  'resource://testing-common/RegionTestUtils.sys.mjs': typeof import('resource://testing-common/RegionTestUtils.sys.mjs');
+  'resource://testing-common/RemoteSettingsServer.sys.mjs': typeof import('resource://testing-common/RemoteSettingsServer.sys.mjs');
+  'resource://testing-common/SearchTestUtils.sys.mjs': typeof import('resource://testing-common/SearchTestUtils.sys.mjs');
+  'resource://testing-common/Sinon.sys.mjs': typeof import('resource://testing-common/Sinon.sys.mjs');
+  'resource://testing-common/SiteDataTestUtils.sys.mjs': typeof import('resource://testing-common/SiteDataTestUtils.sys.mjs');
+  'resource://testing-common/SpecialPowersParent.sys.mjs': typeof import('resource://testing-common/SpecialPowersParent.sys.mjs');
+  'resource://testing-common/SpecialPowersSandbox.sys.mjs': typeof import('resource://testing-common/SpecialPowersSandbox.sys.mjs');
+  'resource://testing-common/TelemetryArchiveTesting.sys.mjs': typeof import('resource://testing-common/TelemetryArchiveTesting.sys.mjs');
+  'resource://testing-common/TelemetryTestUtils.sys.mjs': typeof import('resource://testing-common/TelemetryTestUtils.sys.mjs');
+  'resource://testing-common/TestUtils.sys.mjs': typeof import('resource://testing-common/TestUtils.sys.mjs');
+  'resource://testing-common/UrlbarTestUtils.sys.mjs': typeof import('resource://testing-common/UrlbarTestUtils.sys.mjs');
+  'resource://testing-common/WrapPrivileged.sys.mjs': typeof import('resource://testing-common/WrapPrivileged.sys.mjs');
+  'resource://testing-common/XPCShellContentUtils.sys.mjs': typeof import('resource://testing-common/XPCShellContentUtils.sys.mjs');
+  'resource://testing-common/httpd.sys.mjs': typeof import('resource://testing-common/httpd.sys.mjs');
+  'resource://tps/auth/fxaccounts.sys.mjs': typeof import('resource://tps/auth/fxaccounts.sys.mjs');
+  'resource://tps/logger.sys.mjs': typeof import('resource://tps/logger.sys.mjs');
+  'resource://tps/modules/addons.sys.mjs': typeof import('resource://tps/modules/addons.sys.mjs');
+  'resource://tps/modules/bookmarkValidator.sys.mjs': typeof import('resource://tps/modules/bookmarkValidator.sys.mjs');
+  'resource://tps/modules/bookmarks.sys.mjs': typeof import('resource://tps/modules/bookmarks.sys.mjs');
+  'resource://tps/modules/formautofill.sys.mjs': typeof import('resource://tps/modules/formautofill.sys.mjs');
+  'resource://tps/modules/forms.sys.mjs': typeof import('resource://tps/modules/forms.sys.mjs');
+  'resource://tps/modules/history.sys.mjs': typeof import('resource://tps/modules/history.sys.mjs');
+  'resource://tps/modules/passwords.sys.mjs': typeof import('resource://tps/modules/passwords.sys.mjs');
+  'resource://tps/modules/prefs.sys.mjs': typeof import('resource://tps/modules/prefs.sys.mjs');
+  'resource://tps/modules/tabs.sys.mjs': typeof import('resource://tps/modules/tabs.sys.mjs');
+  'resource://tps/modules/windows.sys.mjs': typeof import('resource://tps/modules/windows.sys.mjs');
+}
--- a/src/zen/@types/lib.gecko.nsresult.d.ts
+++ b/src/zen/@types/lib.gecko.nsresult.d.ts
@@ -0,0 +1,677 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from xpc.msg and error_list.json.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+interface nsIXPCComponents_Results {
+  // Error Message definitions.
+
+  // xpconnect specific codes (from nsIXPConnect.h)
+
+  /** Not enough arguments */
+  NS_ERROR_XPC_NOT_ENOUGH_ARGS: 0x80570001;
+
+  /** 'Out' argument must be an object */
+  NS_ERROR_XPC_NEED_OUT_OBJECT: 0x80570002;
+
+  /** Cannot set 'value' property of 'out' argument */
+  NS_ERROR_XPC_CANT_SET_OUT_VAL: 0x80570003;
+
+  /** Component returned failure code: */
+  NS_ERROR_XPC_NATIVE_RETURNED_FAILURE: 0x80570004;
+
+  /** Cannot find interface information */
+  NS_ERROR_XPC_CANT_GET_INTERFACE_INFO: 0x80570005;
+
+  /** Cannot find interface information for parameter */
+  NS_ERROR_XPC_CANT_GET_PARAM_IFACE_INFO: 0x80570006;
+
+  /** Cannot find method information */
+  NS_ERROR_XPC_CANT_GET_METHOD_INFO: 0x80570007;
+
+  /** Unexpected error in XPConnect */
+  NS_ERROR_XPC_UNEXPECTED: 0x80570008;
+
+  /** Could not convert JavaScript argument */
+  NS_ERROR_XPC_BAD_CONVERT_JS: 0x80570009;
+
+  /** Could not convert Native argument */
+  NS_ERROR_XPC_BAD_CONVERT_NATIVE: 0x8057000a;
+
+  /** Could not convert JavaScript argument (NULL value cannot be used for a C++ reference type) */
+  NS_ERROR_XPC_BAD_CONVERT_JS_NULL_REF: 0x8057000b;
+
+  /** Illegal operation on WrappedNative prototype object */
+  NS_ERROR_XPC_BAD_OP_ON_WN_PROTO: 0x8057000c;
+
+  /** Cannot convert WrappedNative to function */
+  NS_ERROR_XPC_CANT_CONVERT_WN_TO_FUN: 0x8057000d;
+
+  /** Cannot define new property in a WrappedNative */
+  NS_ERROR_XPC_CANT_DEFINE_PROP_ON_WN: 0x8057000e;
+
+  /** Cannot place watchpoints on WrappedNative object static properties */
+  NS_ERROR_XPC_CANT_WATCH_WN_STATIC: 0x8057000f;
+
+  /** Cannot export a WrappedNative object's static properties */
+  NS_ERROR_XPC_CANT_EXPORT_WN_STATIC: 0x80570010;
+
+  /** nsIXPCScriptable::Call failed */
+  NS_ERROR_XPC_SCRIPTABLE_CALL_FAILED: 0x80570011;
+
+  /** nsIXPCScriptable::Construct failed */
+  NS_ERROR_XPC_SCRIPTABLE_CTOR_FAILED: 0x80570012;
+
+  /** Cannot use wrapper as function unless it implements nsIXPCScriptable */
+  NS_ERROR_XPC_CANT_CALL_WO_SCRIPTABLE: 0x80570013;
+
+  /** Cannot use wrapper as constructor unless it implements nsIXPCScriptable */
+  NS_ERROR_XPC_CANT_CTOR_WO_SCRIPTABLE: 0x80570014;
+
+  /** ComponentManager::CreateInstance returned failure code: */
+  NS_ERROR_XPC_CI_RETURNED_FAILURE: 0x80570015;
+
+  /** ServiceManager::GetService returned failure code: */
+  NS_ERROR_XPC_GS_RETURNED_FAILURE: 0x80570016;
+
+  /** Invalid ClassID or ContractID */
+  NS_ERROR_XPC_BAD_CID: 0x80570017;
+
+  /** Invalid InterfaceID */
+  NS_ERROR_XPC_BAD_IID: 0x80570018;
+
+  /** Cannot create wrapper around native interface */
+  NS_ERROR_XPC_CANT_CREATE_WN: 0x80570019;
+
+  /** JavaScript component threw exception */
+  NS_ERROR_XPC_JS_THREW_EXCEPTION: 0x8057001a;
+
+  /** JavaScript component threw a native object that is not an exception */
+  NS_ERROR_XPC_JS_THREW_NATIVE_OBJECT: 0x8057001b;
+
+  /** JavaScript component threw a JavaScript object */
+  NS_ERROR_XPC_JS_THREW_JS_OBJECT: 0x8057001c;
+
+  /** JavaScript component threw a null value as an exception */
+  NS_ERROR_XPC_JS_THREW_NULL: 0x8057001d;
+
+  /** JavaScript component threw a string as an exception */
+  NS_ERROR_XPC_JS_THREW_STRING: 0x8057001e;
+
+  /** JavaScript component threw a number as an exception */
+  NS_ERROR_XPC_JS_THREW_NUMBER: 0x8057001f;
+
+  /** JavaScript component caused a JavaScript error */
+  NS_ERROR_XPC_JAVASCRIPT_ERROR: 0x80570020;
+
+  /** JavaScript component caused a JavaScript error (detailed report attached) */
+  NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS: 0x80570021;
+
+  /** Cannot convert primitive JavaScript value into an array */
+  NS_ERROR_XPC_CANT_CONVERT_PRIMITIVE_TO_ARRAY: 0x80570022;
+
+  /** Cannot convert JavaScript object into an array */
+  NS_ERROR_XPC_CANT_CONVERT_OBJECT_TO_ARRAY: 0x80570023;
+
+  /** JavaScript Array does not have as many elements as indicated by size argument */
+  NS_ERROR_XPC_NOT_ENOUGH_ELEMENTS_IN_ARRAY: 0x80570024;
+
+  /** Cannot find array information */
+  NS_ERROR_XPC_CANT_GET_ARRAY_INFO: 0x80570025;
+
+  /** JavaScript String does not have as many characters as indicated by size argument */
+  NS_ERROR_XPC_NOT_ENOUGH_CHARS_IN_STRING: 0x80570026;
+
+  /** Security Manager vetoed action */
+  NS_ERROR_XPC_SECURITY_MANAGER_VETO: 0x80570027;
+
+  /** Failed to build a wrapper because the interface that was not declared [scriptable] */
+  NS_ERROR_XPC_INTERFACE_NOT_SCRIPTABLE: 0x80570028;
+
+  /** Failed to build a wrapper because the interface does not inherit from nsISupports */
+  NS_ERROR_XPC_INTERFACE_NOT_FROM_NSISUPPORTS: 0x80570029;
+
+  /** Property is a constant and cannot be changed */
+  NS_ERROR_XPC_CANT_SET_READ_ONLY_CONSTANT: 0x8057002b;
+
+  /** Property is a read only attribute and cannot be changed */
+  NS_ERROR_XPC_CANT_SET_READ_ONLY_ATTRIBUTE: 0x8057002c;
+
+  /** Property is an interface method and cannot be changed */
+  NS_ERROR_XPC_CANT_SET_READ_ONLY_METHOD: 0x8057002d;
+
+  /** Cannot add property to WrappedNative object */
+  NS_ERROR_XPC_CANT_ADD_PROP_TO_WRAPPED_NATIVE: 0x8057002e;
+
+  /** Call to nsIXPCScriptable interface for WrappedNative failed unexpecedly */
+  NS_ERROR_XPC_CALL_TO_SCRIPTABLE_FAILED: 0x8057002f;
+
+  /** JavaScript component does not have a method named: */
+  NS_ERROR_XPC_JSOBJECT_HAS_NO_FUNCTION_NAMED: 0x80570030;
+
+  /** Bad ID string */
+  NS_ERROR_XPC_BAD_ID_STRING: 0x80570031;
+
+  /** Bad initializer name in Constructor - Component has no method with that name */
+  NS_ERROR_XPC_BAD_INITIALIZER_NAME: 0x80570032;
+
+  /** Operation failed because the XPConnect subsystem has been shutdown */
+  NS_ERROR_XPC_HAS_BEEN_SHUTDOWN: 0x80570033;
+
+  /** Cannot modify properties of a WrappedNative */
+  NS_ERROR_XPC_CANT_MODIFY_PROP_ON_WN: 0x80570034;
+
+  /** Could not convert JavaScript argument - 0 was passed, expected object. Did you mean null? */
+  NS_ERROR_XPC_BAD_CONVERT_JS_ZERO_ISNOT_NULL: 0x80570035;
+
+  // common global codes (from nsError.h)
+
+  /** Success */
+  NS_OK: 0x0;
+
+  /** Component not initialized */
+  NS_ERROR_NOT_INITIALIZED: 0xc1f30001;
+
+  /** Component already initialized */
+  NS_ERROR_ALREADY_INITIALIZED: 0xc1f30002;
+
+  /** Method not implemented */
+  NS_ERROR_NOT_IMPLEMENTED: 0x80004001;
+
+  /** Component does not have requested interface */
+  NS_NOINTERFACE: 0x80004002;
+
+  /** Component does not have requested interface */
+  NS_ERROR_NO_INTERFACE: 0x80004002;
+
+  /** Illegal value */
+  NS_ERROR_ILLEGAL_VALUE: 0x80070057;
+
+  /** Invalid pointer */
+  NS_ERROR_INVALID_POINTER: 0x80070057;
+
+  /** Null pointer */
+  NS_ERROR_NULL_POINTER: 0x80070057;
+
+  /** Abort */
+  NS_ERROR_ABORT: 0x80004004;
+
+  /** Failure */
+  NS_ERROR_FAILURE: 0x80004005;
+
+  /** Unexpected error */
+  NS_ERROR_UNEXPECTED: 0x8000ffff;
+
+  /** Out of Memory */
+  NS_ERROR_OUT_OF_MEMORY: 0x8007000e;
+
+  /** Invalid argument */
+  NS_ERROR_INVALID_ARG: 0x80070057;
+
+  /** Component is not available */
+  NS_ERROR_NOT_AVAILABLE: 0x80040111;
+
+  /** Factory not registered */
+  NS_ERROR_FACTORY_NOT_REGISTERED: 0x80040154;
+
+  /** Factory not registered (may be tried again) */
+  NS_ERROR_FACTORY_REGISTER_AGAIN: 0x80040155;
+
+  /** Factory not loaded */
+  NS_ERROR_FACTORY_NOT_LOADED: 0x800401f8;
+
+  /** Factory does not support signatures */
+  NS_ERROR_FACTORY_NO_SIGNATURE_SUPPORT: 0xc1f30101;
+
+  /** Factory already exists */
+  NS_ERROR_FACTORY_EXISTS: 0xc1f30100;
+
+  // added from nsError.h on Feb 28 2001...
+
+  /** Stream closed */
+  NS_BASE_STREAM_CLOSED: 0x80470002;
+
+  /** Error from the operating system */
+  NS_BASE_STREAM_OSERROR: 0x80470003;
+
+  /** Illegal arguments */
+  NS_BASE_STREAM_ILLEGAL_ARGS: 0x80470004;
+
+  /** No converter for unichar streams */
+  NS_BASE_STREAM_NO_CONVERTER: 0x80470005;
+
+  /** Bad converter for unichar streams */
+  NS_BASE_STREAM_BAD_CONVERSION: 0x80470006;
+
+  /** Stream would block */
+  NS_BASE_STREAM_WOULD_BLOCK: 0x80470007;
+
+  /** File error: Unrecognized path */
+  NS_ERROR_FILE_UNRECOGNIZED_PATH: 0x80520001;
+
+  /** File error: Unresolvable symlink */
+  NS_ERROR_FILE_UNRESOLVABLE_SYMLINK: 0x80520002;
+
+  /** File error: Execution failed */
+  NS_ERROR_FILE_EXECUTION_FAILED: 0x80520003;
+
+  /** File error: Unknown type */
+  NS_ERROR_FILE_UNKNOWN_TYPE: 0x80520004;
+
+  /** File error: Destination not dir */
+  NS_ERROR_FILE_DESTINATION_NOT_DIR: 0x80520005;
+
+  /** File error: Copy or move failed */
+  NS_ERROR_FILE_COPY_OR_MOVE_FAILED: 0x80520007;
+
+  /** File error: Already exists */
+  NS_ERROR_FILE_ALREADY_EXISTS: 0x80520008;
+
+  /** File error: Invalid path */
+  NS_ERROR_FILE_INVALID_PATH: 0x80520009;
+
+  /** File error: Corrupted */
+  NS_ERROR_FILE_CORRUPTED: 0x8052000b;
+
+  /** File error: Not directory */
+  NS_ERROR_FILE_NOT_DIRECTORY: 0x8052000c;
+
+  /** File error: Is directory */
+  NS_ERROR_FILE_IS_DIRECTORY: 0x8052000d;
+
+  /** File error: Is locked */
+  NS_ERROR_FILE_IS_LOCKED: 0x8052000e;
+
+  /** File error: Too big */
+  NS_ERROR_FILE_TOO_BIG: 0x8052000f;
+
+  /** File error: No device space */
+  NS_ERROR_FILE_NO_DEVICE_SPACE: 0x80520010;
+
+  /** File error: Name too long */
+  NS_ERROR_FILE_NAME_TOO_LONG: 0x80520011;
+
+  /** File error: Not found */
+  NS_ERROR_FILE_NOT_FOUND: 0x80520012;
+
+  /** File error: Read only */
+  NS_ERROR_FILE_READ_ONLY: 0x80520013;
+
+  /** File error: Dir not empty */
+  NS_ERROR_FILE_DIR_NOT_EMPTY: 0x80520014;
+
+  /** File error: Access denied */
+  NS_ERROR_FILE_ACCESS_DENIED: 0x80520015;
+
+  // added from nsError.h on Sept 6 2001...
+
+  /** Data conversion error */
+  NS_ERROR_CANNOT_CONVERT_DATA: 0x80460001;
+
+  /** Can not modify immutable data container */
+  NS_ERROR_OBJECT_IS_IMMUTABLE: 0x80460002;
+
+  /** Data conversion failed because significant data would be lost */
+  NS_ERROR_LOSS_OF_SIGNIFICANT_DATA: 0x80460003;
+
+  /** Data conversion succeeded but data was rounded to fit */
+  NS_SUCCESS_LOSS_OF_INSIGNIFICANT_DATA: 0x460001;
+
+  // network related codes (from nsNetError.h)
+
+  /** The async request failed for some unknown reason */
+  NS_BINDING_FAILED: 0x804b0001;
+
+  /** The async request failed because it was aborted by some user action */
+  NS_BINDING_ABORTED: 0x804b0002;
+
+  /** The async request has been redirected to a different async request */
+  NS_BINDING_REDIRECTED: 0x804b0003;
+
+  /** The async request has been retargeted to a different handler */
+  NS_BINDING_RETARGETED: 0x804b0004;
+
+  /** The URI is malformed */
+  NS_ERROR_MALFORMED_URI: 0x804b000a;
+
+  /** The URI scheme corresponds to an unknown protocol handler */
+  NS_ERROR_UNKNOWN_PROTOCOL: 0x804b0012;
+
+  /** Channel opened successfully but no data will be returned */
+  NS_ERROR_NO_CONTENT: 0x804b0011;
+
+  /** The requested action could not be completed while the object is busy */
+  NS_ERROR_IN_PROGRESS: 0x804b000f;
+
+  /** Channel is already open */
+  NS_ERROR_ALREADY_OPENED: 0x804b0049;
+
+  /** The content encoding of the source document is incorrect */
+  NS_ERROR_INVALID_CONTENT_ENCODING: 0x804b001b;
+
+  /** Corrupted content received from server (potentially MIME type mismatch because of 'X-Content-Type-Options: nosniff') */
+  NS_ERROR_CORRUPTED_CONTENT: 0x804b001d;
+
+  /** Couldn't extract first component from potentially corrupted header field */
+  NS_ERROR_FIRST_HEADER_FIELD_COMPONENT_EMPTY: 0x804b0022;
+
+  /** The connection is already established */
+  NS_ERROR_ALREADY_CONNECTED: 0x804b000b;
+
+  /** The connection does not exist */
+  NS_ERROR_NOT_CONNECTED: 0x804b000c;
+
+  /** The connection was refused */
+  NS_ERROR_CONNECTION_REFUSED: 0x804b000d;
+
+  /** User refused navigation to potentially unsafe URL with embedded credentials/superfluos authentication */
+  NS_ERROR_SUPERFLUOS_AUTH: 0x804b005b;
+
+  /** User attempted basic HTTP authentication when it is disabled */
+  NS_ERROR_BASIC_HTTP_AUTH_DISABLED: 0x804b005c;
+
+  // Error codes return from the proxy
+
+  /** The connection to the proxy server was refused */
+  NS_ERROR_PROXY_CONNECTION_REFUSED: 0x804b0048;
+
+  /** The proxy requires authentication */
+  NS_ERROR_PROXY_AUTHENTICATION_FAILED: 0x804b057f;
+
+  /** The request failed on the proxy */
+  NS_ERROR_PROXY_BAD_GATEWAY: 0x804b05de;
+
+  /** The request timed out on the proxy */
+  NS_ERROR_PROXY_GATEWAY_TIMEOUT: 0x804b05e0;
+
+  /** Sending too many requests to a proxy */
+  NS_ERROR_PROXY_TOO_MANY_REQUESTS: 0x804b0595;
+
+  /** The proxy does not support the version of the HTTP request */
+  NS_ERROR_PROXY_VERSION_NOT_SUPPORTED: 0x804b05e1;
+
+  /** The user is banned from the proxy */
+  NS_ERROR_PROXY_FORBIDDEN: 0x804b057b;
+
+  /** The proxy is not available */
+  NS_ERROR_PROXY_SERVICE_UNAVAILABLE: 0x804b05df;
+
+  /** The desired destination is unavailable for legal reasons */
+  NS_ERROR_PROXY_UNAVAILABLE_FOR_LEGAL_REASONS: 0x804b05ab;
+
+  /** The connection has timed out */
+  NS_ERROR_NET_TIMEOUT: 0x804b000e;
+
+  /** The request has been cancelled because of a timeout */
+  NS_ERROR_NET_TIMEOUT_EXTERNAL: 0x804b0055;
+
+  /** The requested action could not be completed in the offline state */
+  NS_ERROR_OFFLINE: 0x804b0010;
+
+  /** Establishing a connection to an unsafe or otherwise banned port was prohibited */
+  NS_ERROR_PORT_ACCESS_NOT_ALLOWED: 0x804b0013;
+
+  /** The connection was established, but no data was ever received */
+  NS_ERROR_NET_RESET: 0x804b0014;
+
+  /** The connection was established, but the browser received an empty page with an error response */
+  NS_ERROR_NET_EMPTY_RESPONSE: 0x804b0024;
+
+  /** The connection was established, but the browser received an error response from the server */
+  NS_ERROR_NET_ERROR_RESPONSE: 0x804b0023;
+
+  /** The connection was established, but the data transfer was interrupted */
+  NS_ERROR_NET_INTERRUPT: 0x804b0047;
+
+  /** A transfer was only partially done when it completed */
+  NS_ERROR_NET_PARTIAL_TRANSFER: 0x804b004c;
+
+  /** There has been a http3 protocol error */
+  NS_ERROR_NET_HTTP3_PROTOCOL_ERROR: 0x804b0054;
+
+  /** This request is not resumable, but it was tried to resume it, or to request resume-specific data */
+  NS_ERROR_NOT_RESUMABLE: 0x804b0019;
+
+  /** It was attempted to resume the request, but the entity has changed in the meantime */
+  NS_ERROR_ENTITY_CHANGED: 0x804b0020;
+
+  /** The request failed as a result of a detected redirection loop */
+  NS_ERROR_REDIRECT_LOOP: 0x804b001f;
+
+  /** The request failed because the content type returned by the server was not a type expected by the channel */
+  NS_ERROR_UNSAFE_CONTENT_TYPE: 0x804b004a;
+
+  /** The load caused an error page to be displayed. */
+  NS_ERROR_LOAD_SHOWED_ERRORPAGE: 0x804b004d;
+
+  /** The request was blocked by a policy set by the system administrator. */
+  NS_ERROR_BLOCKED_BY_POLICY: 0x80780003;
+
+  /** The lookup of the hostname failed */
+  NS_ERROR_UNKNOWN_HOST: 0x804b001e;
+
+  /** The DNS lookup queue is full */
+  NS_ERROR_DNS_LOOKUP_QUEUE_FULL: 0x804b0021;
+
+  /** The lookup of the proxy hostname failed */
+  NS_ERROR_UNKNOWN_PROXY_HOST: 0x804b002a;
+
+  /** The specified socket type does not exist */
+  NS_ERROR_UNKNOWN_SOCKET_TYPE: 0x804b0033;
+
+  /** The specified socket type could not be created */
+  NS_ERROR_SOCKET_CREATE_FAILED: 0x804b0034;
+
+  /** The specified socket address type is not supported */
+  NS_ERROR_SOCKET_ADDRESS_NOT_SUPPORTED: 0x804b0035;
+
+  /** Some other socket is already using the specified address. */
+  NS_ERROR_SOCKET_ADDRESS_IN_USE: 0x804b0036;
+
+  /** Cache key could not be found */
+  NS_ERROR_CACHE_KEY_NOT_FOUND: 0x804b003d;
+
+  /** Cache data is a stream */
+  NS_ERROR_CACHE_DATA_IS_STREAM: 0x804b003e;
+
+  /** Cache data is not a stream */
+  NS_ERROR_CACHE_DATA_IS_NOT_STREAM: 0x804b003f;
+
+  /** Cache entry exists but needs to be validated first */
+  NS_ERROR_CACHE_WAIT_FOR_VALIDATION: 0x804b0040;
+
+  /** Cache entry has been  doomed */
+  NS_ERROR_CACHE_ENTRY_DOOMED: 0x804b0041;
+
+  /** Read access to cache denied */
+  NS_ERROR_CACHE_READ_ACCESS_DENIED: 0x804b0042;
+
+  /** Write access to cache denied */
+  NS_ERROR_CACHE_WRITE_ACCESS_DENIED: 0x804b0043;
+
+  /** Cache is currently in use */
+  NS_ERROR_CACHE_IN_USE: 0x804b0044;
+
+  /** Document does not exist in cache */
+  NS_ERROR_DOCUMENT_NOT_CACHED: 0x804b0046;
+
+  /** The requested number of domain levels exceeds those present in the host string */
+  NS_ERROR_INSUFFICIENT_DOMAIN_LEVELS: 0x804b0050;
+
+  /** The host string is an IP address */
+  NS_ERROR_HOST_IS_IP_ADDRESS: 0x804b0051;
+
+  /** Can't access a wrapped JS object from a different thread */
+  NS_ERROR_NOT_SAME_THREAD: 0x80460004;
+
+  // storage related codes (from mozStorage.h)
+
+  /** SQLite database connection is busy */
+  NS_ERROR_STORAGE_BUSY: 0x80630001;
+
+  /** SQLite encountered an IO error */
+  NS_ERROR_STORAGE_IOERR: 0x80630002;
+
+  /** SQLite database operation failed because a constraint was violated */
+  NS_ERROR_STORAGE_CONSTRAINT: 0x80630003;
+
+  // plugin related codes (from nsPluginError.h)
+
+  /** Clearing site data by time range not supported by plugin */
+  NS_ERROR_PLUGIN_TIME_RANGE_NOT_SUPPORTED: 0x804c03eb;
+
+  // character converter related codes
+
+  /** The input characters have illegal sequences */
+  NS_ERROR_ILLEGAL_INPUT: 0x8050000e;
+
+  // Codes related to signd jars
+
+  /** The JAR is not signed. */
+  NS_ERROR_SIGNED_JAR_NOT_SIGNED: 0x80680001;
+
+  /** An entry in the JAR has been modified after the JAR was signed. */
+  NS_ERROR_SIGNED_JAR_MODIFIED_ENTRY: 0x80680002;
+
+  /** An entry in the JAR has not been signed. */
+  NS_ERROR_SIGNED_JAR_UNSIGNED_ENTRY: 0x80680003;
+
+  /** An entry is missing from the JAR file. */
+  NS_ERROR_SIGNED_JAR_ENTRY_MISSING: 0x80680004;
+
+  /** The JAR's signature is wrong. */
+  NS_ERROR_SIGNED_JAR_WRONG_SIGNATURE: 0x80680005;
+
+  /** An entry in the JAR is too large. */
+  NS_ERROR_SIGNED_JAR_ENTRY_TOO_LARGE: 0x80680006;
+
+  /** An entry in the JAR is invalid. */
+  NS_ERROR_SIGNED_JAR_ENTRY_INVALID: 0x80680007;
+
+  /** The JAR's manifest or signature file is invalid. */
+  NS_ERROR_SIGNED_JAR_MANIFEST_INVALID: 0x80680008;
+
+  /** The PKCS#7 signature is malformed or invalid. */
+  NS_ERROR_CMS_VERIFY_NO_CONTENT_INFO: 0x805a0401;
+
+  /** The PKCS#7 information is not signed. */
+  NS_ERROR_CMS_VERIFY_NOT_SIGNED: 0x805a0400;
+
+  // Codes related to signed manifests
+
+  /** The signed app manifest or signature file is invalid. */
+  NS_ERROR_SIGNED_APP_MANIFEST_INVALID: 0x806b0001;
+
+  // Codes for printing-related errors.
+
+  /** No printers available. */
+  NS_ERROR_GFX_PRINTER_NO_PRINTER_AVAILABLE: 0x80480001;
+
+  /** The selected printer could not be found. */
+  NS_ERROR_GFX_PRINTER_NAME_NOT_FOUND: 0x80480002;
+
+  /** Failed to open output file for print to file. */
+  NS_ERROR_GFX_PRINTER_COULD_NOT_OPEN_FILE: 0x80480003;
+
+  /** Printing failed while starting the print job. */
+  NS_ERROR_GFX_PRINTER_STARTDOC: 0x80480004;
+
+  /** Printing failed while completing the print job. */
+  NS_ERROR_GFX_PRINTER_ENDDOC: 0x80480005;
+
+  /** Printing failed while starting a new page. */
+  NS_ERROR_GFX_PRINTER_STARTPAGE: 0x80480006;
+
+  /** Cannot print this document yet, it is still being loaded. */
+  NS_ERROR_GFX_PRINTER_DOC_IS_BUSY: 0x80480007;
+
+  // Codes related to content
+
+  /** The process that hosted this content has crashed. */
+  NS_ERROR_CONTENT_CRASHED: 0x805e0010;
+
+  /** The process that hosted this frame has crashed. */
+  NS_ERROR_FRAME_CRASHED: 0x805e000e;
+
+  /** The process that hosted this content did not have the same buildID as the parent. */
+  NS_ERROR_BUILDID_MISMATCH: 0x805e0011;
+
+  /** The load for this content was blocked. */
+  NS_ERROR_CONTENT_BLOCKED: 0x805e0006;
+
+  // Codes for the JS-implemented Push DOM API. These can be removed as part of bug 1252660.
+
+  /** Invalid raw ECDSA P-256 public key. */
+  NS_ERROR_DOM_PUSH_INVALID_KEY_ERR: 0x806d0005;
+
+  /** A subscription with a different application server key already exists. */
+  NS_ERROR_DOM_PUSH_MISMATCHED_KEY_ERR: 0x806d0006;
+
+  // Codes defined in WebIDL https://heycam.github.io/webidl/#idl-DOMException-error-names
+
+  /** The object can not be found here. */
+  NS_ERROR_DOM_NOT_FOUND_ERR: 0x80530008;
+
+  /** The request is not allowed. */
+  NS_ERROR_DOM_NOT_ALLOWED_ERR: 0x80530021;
+
+  // Codes related to the URIClassifier service
+
+  /** The URI is malware */
+  NS_ERROR_MALWARE_URI: 0x805d001e;
+
+  /** The URI is phishing */
+  NS_ERROR_PHISHING_URI: 0x805d001f;
+
+  /** The URI is tracking */
+  NS_ERROR_TRACKING_URI: 0x805d0022;
+
+  /** The URI is unwanted */
+  NS_ERROR_UNWANTED_URI: 0x805d0023;
+
+  /** The URI is blocked */
+  NS_ERROR_BLOCKED_URI: 0x805d0025;
+
+  /** The URI is harmful */
+  NS_ERROR_HARMFUL_URI: 0x805d0026;
+
+  /** The URI is fingerprinting */
+  NS_ERROR_FINGERPRINTING_URI: 0x805d0029;
+
+  /** The URI is cryptomining */
+  NS_ERROR_CRYPTOMINING_URI: 0x805d002a;
+
+  /** The URI is social tracking */
+  NS_ERROR_SOCIALTRACKING_URI: 0x805d002b;
+
+  /** The URI is email tracking */
+  NS_ERROR_EMAILTRACKING_URI: 0x805d002c;
+
+  // Profile manager error codes
+
+  /** Flushing the profiles to disk would have overwritten changes made elsewhere. */
+  NS_ERROR_DATABASE_CHANGED: 0x805800ca;
+
+  // Codes related to URILoader
+
+  /** The data from a channel has already been parsed and cached so it doesn't need to be reparsed from the original source. */
+  NS_ERROR_PARSED_DATA_CACHED: 0x805d0021;
+
+  /** The async request has been cancelled by another async request */
+  NS_BINDING_CANCELLED_OLD_LOAD: 0x805d0027;
+
+  /** The ProgID classes had not been registered. */
+  NS_ERROR_WDBA_NO_PROGID: 0x80720001;
+
+  /** The existing UserChoice Hash could not be verified. */
+  NS_ERROR_WDBA_HASH_CHECK: 0x80720002;
+
+  /** UserChoice was set, but checking the default did not return our ProgID. */
+  NS_ERROR_WDBA_REJECTED: 0x80720003;
+
+  /** The existing UserChoice Hash was verified, but we're on an older, unsupported Windows build, so do not attempt to update the UserChoice hash. */
+  NS_ERROR_WDBA_BUILD: 0x80720004;
+}
+
+type nsIXPCComponents_Values = nsIXPCComponents_Results[keyof nsIXPCComponents_Results];
--- a/src/zen/@types/lib.gecko.services.d.ts
+++ b/src/zen/@types/lib.gecko.services.d.ts
@@ -0,0 +1,62 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from services.json.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+interface JSServices {
+  DAPTelemetry: nsIDAPTelemetry;
+  appShell: nsIAppShellService;
+  appinfo: nsICrashReporter & nsIXULAppInfo & nsIXULRuntime;
+  blocklist: nsIBlocklistService;
+  cache2: nsICacheStorageService;
+  catMan: nsICategoryManager;
+  clearData: nsIClearDataService;
+  clipboard: nsIClipboard;
+  console: nsIConsoleService;
+  cookieBanners: nsICookieBannerService;
+  cookies: nsICookieManager & nsICookieService;
+  cpmm: ContentProcessMessageManager;
+  dirsvc: nsIDirectoryService & nsIProperties;
+  dns: nsIDNSService;
+  domStorageManager: nsIDOMStorageManager & nsILocalStorageManager;
+  droppedLinkHandler: nsIDroppedLinkHandler;
+  eTLD: nsIEffectiveTLDService;
+  els: nsIEventListenerService;
+  env: nsIEnvironment;
+  focus: nsIFocusManager;
+  fog: nsIFOG;
+  intl: mozIMozIntl;
+  io: nsIIOService & nsINetUtil & nsISpeculativeConnect;
+  loadContextInfo: nsILoadContextInfoFactory;
+  locale: mozILocaleService;
+  logins: nsILoginManager;
+  mm: ChromeMessageBroadcaster;
+  obs: nsIObserverService;
+  perms: nsIPermissionManager;
+  policies: nsIEnterprisePolicies;
+  ppmm: ParentProcessMessageManager;
+  prefs: nsIPrefBranch & nsIPrefService;
+  profiler: nsIProfiler;
+  prompt: nsIPromptService;
+  qms: nsIQuotaManagerService;
+  rfp: nsIRFPService;
+  scriptSecurityManager: nsIScriptSecurityManager;
+  scriptloader: mozIJSSubScriptLoader;
+  search: nsISearchService;
+  sessionStorage: nsISessionStorageService;
+  startup: nsIAppStartup;
+  storage: mozIStorageService;
+  strings: nsIStringBundleService;
+  sysinfo: nsIPropertyBag2 & nsISystemInfo;
+  telemetry: nsITelemetry;
+  textToSubURI: nsITextToSubURI;
+  tm: nsIThreadManager;
+  uriFixup: nsIURIFixup;
+  urlFormatter: nsIURLFormatter;
+  uuid: nsIUUIDGenerator;
+  vc: nsIVersionComparator;
+  wm: nsIWindowMediator;
+  ww: nsIWindowWatcher;
+  xulStore: nsIXULStore;
+}
--- a/src/zen/@types/lib.gecko.tweaks.d.ts
+++ b/src/zen/@types/lib.gecko.tweaks.d.ts
@@ -0,0 +1,114 @@
+/**
+ * Gecko generic/specialized adjustments for xpcom and webidl types.
+ */
+
+// More specific types for parent process browsing contexts.
+interface CanonicalBrowsingContext extends LoadContextMixin {
+  embedderElement: XULBrowserElement;
+  currentWindowContext: WindowGlobalParent;
+  parent: CanonicalBrowsingContext;
+  parentWindowContext: WindowGlobalParent;
+  top: CanonicalBrowsingContext;
+  topWindowContext: WindowGlobalParent;
+}
+
+interface ChromeWindow extends Window {
+  isChromeWindow: true;
+}
+
+interface Document {
+  createXULElement(name: 'browser'): XULBrowserElement;
+}
+
+type nsIGleanPingNoReason = {
+  [K in keyof nsIGleanPing]: K extends 'submit' ? (_?: never) => void : nsIGleanPing[K];
+};
+
+type nsIGleanPingWithReason<T> = {
+  [K in keyof nsIGleanPing]: K extends 'submit' ? (reason: T) => void : nsIGleanPing[K];
+};
+
+interface MessageListenerManagerMixin {
+  // Overloads that define `data` arg as required, since it's ~always expected.
+  addMessageListener(msg: string, listener: { receiveMessage(_: ReceiveMessageArgument & { data }) });
+  removeMessageListener(msg: string, listener: { receiveMessage(_: ReceiveMessageArgument & { data }) });
+}
+
+interface MozQueryInterface {
+  <T>(iid: T): nsQIResult<T>;
+}
+
+interface nsICryptoHash extends nsISupports {
+  // Accepts a TypedArray.
+  update(aData: ArrayLike<number>, aLen: number): void;
+}
+
+interface nsIDOMWindow extends Window {}
+
+interface nsISimpleEnumerator extends Iterable<any> {}
+
+interface nsISupports {
+  wrappedJSObject?: object;
+}
+
+interface nsIXPCComponents_Constructor {
+  <const T, IIDs = nsIXPCComponents_Interfaces>(
+    cid,
+    id: T,
+    init?
+  ): {
+    new (...any): nsQIResult<T extends keyof IIDs ? IIDs[T] : T>;
+    (...any): nsQIResult<T extends keyof IIDs ? IIDs[T] : T>;
+  };
+}
+
+interface ComponentsExceptionOptions {
+  result?: number;
+  stack?: nsIStackFrame;
+  data?: object;
+}
+
+interface nsIException extends Exception {}
+
+interface nsIXPCComponents_Exception {
+  (message?: string, resultOrOptions?: number | ComponentsExceptionOptions, stack?: nsIStackFrame, data?: object): nsIException;
+}
+
+interface nsIXPCComponents_ID {
+  (uuid: string): nsID;
+}
+
+interface nsIXPCComponents_utils_Sandbox {
+  (principal: nsIPrincipal | nsIPrincipal[], options: object): Sandbox;
+}
+
+interface nsXPCComponents_Classes {
+  [cid: string]: {
+    createInstance<T>(aID: T): nsQIResult<T>;
+    getService<T>(aID?: T): unknown extends T ? nsISupports : nsQIResult<T>;
+  };
+}
+
+// Generic overloads.
+interface nsXPCComponents_Utils {
+  cloneInto<T>(value: T, ...any): T;
+  createObjectIn<T = object>(_, object?: T): T;
+  exportFunction<T>(func: T, ...any): T;
+  getWeakReference<T>(value: T): { get(): T };
+  waiveXrays<T>(object: T): T;
+}
+
+type Sandbox = typeof globalThis & nsISupports;
+
+// Hand-crafted artisanal types.
+interface XULBrowserElement extends XULFrameElement, FrameLoader {
+  currentURI: nsIURI;
+  docShellIsActive: boolean;
+  isRemoteBrowser: boolean;
+  remoteType: string;
+}
+
+// https://github.com/microsoft/TypeScript-DOM-lib-generator/issues/1736
+interface Localization {
+  formatValuesSync(aKeys: L10nKey[]): (string | null)[];
+}
--- a/src/zen/@types/lib.gecko.win32.d.ts
+++ b/src/zen/@types/lib.gecko.win32.d.ts
@@ -0,0 +1,392 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from source XPCOM .idl files.
+ * If you're updating some of the sources, see README for instructions.
+ */
+
+declare global {
+  // https://searchfox.org/mozilla-central/source/toolkit/components/aboutthirdparty/nsIAboutThirdParty.idl
+
+  interface nsIInstalledApplication extends nsISupports {
+    readonly name: string;
+    readonly publisher: string;
+  }
+
+  interface nsIAboutThirdParty extends nsISupports {
+    readonly ModuleType_Unknown?: 1;
+    readonly ModuleType_IME?: 2;
+    readonly ModuleType_ShellExtension?: 4;
+    readonly ModuleType_BlockedByUser?: 8;
+    readonly ModuleType_BlockedByUserAtLaunch?: 16;
+
+    lookupModuleType(aLeafName: string): u32;
+    lookupApplication(aModulePath: string): nsIInstalledApplication;
+    readonly isDynamicBlocklistAvailable: boolean;
+    readonly isDynamicBlocklistDisabled: boolean;
+    updateBlocklist(aLeafName: string, aNewBlockStatus: boolean): Promise<any>;
+    collectSystemInfo(): Promise<any>;
+    loadModuleForTesting(aModulePath: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/components/aboutwindowsmessages/nsIAboutWindowsMessages.idl
+
+  interface nsIAboutWindowsMessages extends nsISupports {
+    getMessages(currentWindow: mozIDOMWindowProxy, messages: OutParam<string[][]>, windowTitles: OutParam<string[]>): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/components/alerts/nsIWindowsAlertsService.idl
+} // global
+
+declare enum nsIWindowsAlertNotification_ImagePlacement {
+  eInline = 0,
+  eHero = 1,
+  eIcon = 2,
+}
+
+declare global {
+  namespace nsIWindowsAlertNotification {
+    type ImagePlacement = nsIWindowsAlertNotification_ImagePlacement;
+  }
+
+  interface nsIWindowsAlertNotification extends nsIAlertNotification, Enums<typeof nsIWindowsAlertNotification_ImagePlacement> {
+    imagePlacement: nsIWindowsAlertNotification.ImagePlacement;
+  }
+
+  interface nsIWindowsAlertsService extends nsIAlertsService {
+    handleWindowsTag(aWindowsTag: string): Promise<any>;
+    getXmlStringForWindowsAlert(aAlert: nsIAlertNotification, aWindowsTag?: string): string;
+    removeAllNotificationsForInstall(): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/mozapps/defaultagent/nsIDefaultAgent.idl
+
+  interface nsIDefaultAgent extends nsISupports {
+    registerTask(aUniqueToken: string): void;
+    updateTask(aUniqueToken: string): void;
+    unregisterTask(aUniqueToken: string): void;
+    uninstall(aUniqueToken: string): void;
+    secondsSinceLastAppRun(): i64;
+    getDefaultBrowser(): string;
+    getReplacePreviousDefaultBrowser(aCurrentBrowser: string): string;
+    getDefaultPdfHandler(): string;
+    sendPing(
+      aCurrentBrowser: string,
+      aPreviousBrowser: string,
+      aPdfHandler: string,
+      aNotificationShown: string,
+      aNotificationAction: string,
+      daysSinceLastAppLaunch: u32
+    ): void;
+    setDefaultBrowserUserChoice(aAumid: string, aExtraFileExtensions: string[]): void;
+    setDefaultBrowserUserChoiceAsync(aAumid: string, aExtraFileExtensions: string[]): Promise<any>;
+    setDefaultExtensionHandlersUserChoice(aAumid: string, aFileExtensions: string[]): void;
+    agentDisabled(): boolean;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/mozapps/defaultagent/nsIWindowsMutex.idl
+
+  interface nsIWindowsMutex extends nsISupports {
+    tryLock(): void;
+    isLocked(): boolean;
+    unlock(): void;
+  }
+
+  interface nsIWindowsMutexFactory extends nsISupports {
+    createMutex(aName: string): nsIWindowsMutex;
+  }
+
+  // https://searchfox.org/mozilla-central/source/dom/geolocation/nsIGeolocationUIUtilsWin.idl
+
+  interface nsIGeolocationUIUtilsWin extends nsISupports {
+    dismissPrompts(aBC: BrowsingContext): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/netwerk/socket/nsINamedPipeService.idl
+
+  // https://searchfox.org/mozilla-central/source/browser/components/shell/nsIWindowsShellService.idl
+} // global
+
+declare enum nsIWindowsShellService_LaunchOnLoginEnabledEnumerator {
+  LAUNCH_ON_LOGIN_DISABLED_BY_SETTINGS = 0,
+  LAUNCH_ON_LOGIN_DISABLED = 1,
+  LAUNCH_ON_LOGIN_ENABLED = 2,
+  LAUNCH_ON_LOGIN_ENABLED_BY_POLICY = 3,
+}
+
+declare global {
+  namespace nsIWindowsShellService {
+    type LaunchOnLoginEnabledEnumerator = nsIWindowsShellService_LaunchOnLoginEnabledEnumerator;
+  }
+
+  interface nsIWindowsShellService
+    extends nsIShellService,
+      Enums<typeof nsIWindowsShellService_LaunchOnLoginEnabledEnumerator> {
+    createShortcut(
+      aBinary: nsIFile,
+      aArguments: string[],
+      aDescription: string,
+      aIconFile: nsIFile,
+      aIconIndex: u16,
+      aAppUserModelId: string,
+      aShortcutFolder: string,
+      aShortcutName: string
+    ): Promise<any>;
+    getLaunchOnLoginShortcuts(): string[];
+    pinCurrentAppToStartMenuAsync(aCheckOnly: boolean): Promise<any>;
+    isCurrentAppPinnedToStartMenuAsync(): Promise<any>;
+    enableLaunchOnLoginMSIXAsync(aTaskId: string): Promise<any>;
+    disableLaunchOnLoginMSIXAsync(aTaskId: string): Promise<any>;
+    getLaunchOnLoginEnabledMSIXAsync(aTaskId: string): Promise<any>;
+    pinCurrentAppToTaskbarAsync(aPrivateBrowsing: boolean): Promise<any>;
+    checkPinCurrentAppToTaskbarAsync(aPrivateBrowsing: boolean): Promise<any>;
+    isCurrentAppPinnedToTaskbarAsync(aumid: string): Promise<any>;
+    pinShortcutToTaskbar(aAppUserModelId: string, aShortcutPath: string): Promise<any>;
+    createWindowsIcon(aFile: nsIFile, aContainer: imgIContainer): Promise<any>;
+    unpinShortcutFromTaskbar(aShortcutPath: string): void;
+    getTaskbarTabShortcutPath(aShortcutName: string): string;
+    getTaskbarTabPins(): string[];
+    classifyShortcut(aPath: string): string;
+    hasPinnableShortcut(aAUMID: string, aPrivateBrowsing: boolean): Promise<any>;
+    canSetDefaultBrowserUserChoice(): boolean;
+    checkAllProgIDsExist(): boolean;
+    checkBrowserUserChoiceHashes(): boolean;
+    isDefaultHandlerFor(aFileExtensionOrProtocol: string): boolean;
+    queryCurrentDefaultHandlerFor(aFileExtensionOrProtocol: string): string;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/components/taskscheduler/nsIWinTaskSchedulerService.idl
+
+  interface nsIWinTaskSchedulerService extends nsISupports {
+    registerTask(aFolderName: string, aTaskName: string, aDefinitionXML: string, aUpdateExisting?: boolean): void;
+    validateTaskDefinition(aDefinitionXML: string): i32;
+    getTaskXML(aFolderName: string, aTaskName: string): string;
+    getCurrentUserSid(): string;
+    deleteTask(aFolderName: string, aTaskName: string): void;
+    getFolderTasks(aFolderName: string): string[];
+    createFolder(aParentFolderName: string, aSubFolderName: string): void;
+    deleteFolder(aParentFolderName: string, aSubFolderName: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIJumpListBuilder.idl
+
+  interface nsIJumpListBuilder extends nsISupports {
+    obtainAndCacheFavicon(faviconURL: nsIURI): string;
+    obtainAndCacheFaviconAsync(faviconURL: nsIURI): Promise<any>;
+    isAvailable(): Promise<any>;
+    checkForRemovals(): Promise<any>;
+    populateJumpList(aTaskDescriptions: any, aCustomTitle: string, aCustomDescriptions: any): Promise<any>;
+    clearJumpList(): Promise<any>;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIPrintSettingsWin.idl
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarOverlayIconController.idl
+
+  interface nsITaskbarOverlayIconController extends nsISupports {
+    setOverlayIcon(statusIcon: imgIContainer, statusDescription: string, paintContext?: nsISVGPaintContext): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarPreview.idl
+
+  interface nsITaskbarPreview extends nsISupports {
+    controller: nsITaskbarPreviewController;
+    tooltip: string;
+    visible: boolean;
+    active: boolean;
+    invalidate(): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarPreviewButton.idl
+
+  interface nsITaskbarPreviewButton extends nsISupports {
+    tooltip: string;
+    dismissOnClick: boolean;
+    hasBorder: boolean;
+    disabled: boolean;
+    image: imgIContainer;
+    visible: boolean;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarPreviewController.idl
+
+  type nsITaskbarPreviewCallback = Callable<{
+    done(aCanvas: nsISupports, aDrawBorder: boolean): void;
+  }>;
+
+  interface nsITaskbarPreviewController extends nsISupports {
+    readonly width: u32;
+    readonly height: u32;
+    readonly thumbnailAspectRatio: float;
+    requestPreview(aCallback: nsITaskbarPreviewCallback): void;
+    requestThumbnail(aCallback: nsITaskbarPreviewCallback, width: u32, height: u32): void;
+    onClose(): void;
+    onActivate(): boolean;
+    onClick(button: nsITaskbarPreviewButton): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarProgress.idl
+
+  interface nsITaskbarProgress extends nsISupports {
+    readonly STATE_NO_PROGRESS?: 0;
+    readonly STATE_INDETERMINATE?: 1;
+    readonly STATE_NORMAL?: 2;
+    readonly STATE_ERROR?: 3;
+    readonly STATE_PAUSED?: 4;
+
+    setProgressState(state: nsTaskbarProgressState, currentValue?: u64, maxValue?: u64): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarTabPreview.idl
+
+  interface nsITaskbarTabPreview extends nsITaskbarPreview {
+    title: string;
+    icon: imgIContainer;
+    move(aNext: nsITaskbarTabPreview): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsITaskbarWindowPreview.idl
+
+  interface nsITaskbarWindowPreview extends nsITaskbarPreview {
+    readonly NUM_TOOLBAR_BUTTONS?: 7;
+
+    getButton(index: u32): nsITaskbarPreviewButton;
+    enableCustomDrawing: boolean;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIWinTaskbar.idl
+
+  interface nsIWinTaskbar extends nsISupports {
+    readonly available: boolean;
+    readonly defaultGroupId: string;
+    readonly defaultPrivateGroupId: string;
+    createTaskbarTabPreview(shell: nsIDocShell, controller: nsITaskbarPreviewController): nsITaskbarTabPreview;
+    getTaskbarWindowPreview(shell: nsIDocShell): nsITaskbarWindowPreview;
+    getTaskbarProgress(shell: nsIDocShell): nsITaskbarProgress;
+    getOverlayIconController(shell: nsIDocShell): nsITaskbarOverlayIconController;
+    createJumpListBuilder(aPrivateBrowsing: boolean): nsIJumpListBuilder;
+    getGroupIdForWindow(aParent: mozIDOMWindow): string;
+    setGroupIdForWindow(aParent: mozIDOMWindow, aIdentifier: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/widget/nsIWindowsUIUtils.idl
+
+  interface nsIWindowsUIUtils extends nsISupports {
+    readonly systemSmallIconSize: i32;
+    readonly systemLargeIconSize: i32;
+    setWindowIcon(aWindow: mozIDOMWindowProxy, aSmallIcon: imgIContainer, aLargeIcon: imgIContainer): void;
+    setWindowIconFromExe(aWindow: mozIDOMWindowProxy, aExe: string, aIndex: u16): void;
+    setWindowIconNoData(aWindow: mozIDOMWindowProxy): void;
+    readonly inWin10TabletMode: boolean;
+    readonly inWin11TabletMode: boolean;
+    shareUrl(shareTitle: string, urlToShare: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/system/windowsPackageManager/nsIWindowsPackageManager.idl
+
+  interface nsIWindowsPackageManager extends nsISupports {
+    findUserInstalledPackages(prefix: string[]): string[];
+    getInstalledDate(): u64;
+    campaignId(): Promise<any>;
+  }
+
+  // https://searchfox.org/mozilla-central/source/xpcom/ds/nsIWindowsRegKey.idl
+
+  interface nsIWindowsRegKey extends nsISupports {
+    readonly ROOT_KEY_CLASSES_ROOT?: 2147483648;
+    readonly ROOT_KEY_CURRENT_USER?: 2147483649;
+    readonly ROOT_KEY_LOCAL_MACHINE?: 2147483650;
+    readonly ACCESS_BASIC?: 131072;
+    readonly ACCESS_QUERY_VALUE?: 1;
+    readonly ACCESS_SET_VALUE?: 2;
+    readonly ACCESS_CREATE_SUB_KEY?: 4;
+    readonly ACCESS_ENUMERATE_SUB_KEYS?: 8;
+    readonly ACCESS_NOTIFY?: 16;
+    readonly ACCESS_READ?: 131097;
+    readonly ACCESS_WRITE?: 131078;
+    readonly ACCESS_ALL?: 131103;
+    readonly WOW64_32?: 512;
+    readonly WOW64_64?: 256;
+    readonly TYPE_NONE?: 0;
+    readonly TYPE_STRING?: 1;
+    readonly TYPE_BINARY?: 3;
+    readonly TYPE_INT?: 4;
+    readonly TYPE_INT64?: 11;
+
+    close(): void;
+    open(rootKey: u32, relPath: string, mode: u32): void;
+    create(rootKey: u32, relPath: string, mode: u32): void;
+    openChild(relPath: string, mode: u32): nsIWindowsRegKey;
+    createChild(relPath: string, mode: u32): nsIWindowsRegKey;
+    readonly childCount: u32;
+    getChildName(index: u32): string;
+    hasChild(name: string): boolean;
+    readonly valueCount: u32;
+    getValueName(index: u32): string;
+    hasValue(name: string): boolean;
+    removeChild(relPath: string): void;
+    removeValue(name: string): void;
+    getValueType(name: string): u32;
+    readStringValue(name: string): string;
+    readIntValue(name: string): u32;
+    readInt64Value(name: string): u64;
+    readBinaryValue(name: string): string;
+    writeStringValue(name: string, data: string): void;
+    writeIntValue(name: string, data: u32): void;
+    writeInt64Value(name: string, data: u64): void;
+    writeBinaryValue(name: string, data: string): void;
+  }
+
+  // https://searchfox.org/mozilla-central/source/toolkit/xre/nsIWinAppHelper.idl
+
+  interface nsIWinAppHelper extends nsISupports {
+    readonly userCanElevate: boolean;
+  }
+
+  interface nsIXPCComponents_Interfaces {
+    nsIInstalledApplication: nsJSIID<nsIInstalledApplication>;
+    nsIAboutThirdParty: nsJSIID<nsIAboutThirdParty>;
+    nsIAboutWindowsMessages: nsJSIID<nsIAboutWindowsMessages>;
+    nsIWindowsAlertNotification: nsJSIID<nsIWindowsAlertNotification, typeof nsIWindowsAlertNotification_ImagePlacement>;
+    nsIWindowsAlertsService: nsJSIID<nsIWindowsAlertsService>;
+    nsIDefaultAgent: nsJSIID<nsIDefaultAgent>;
+    nsIWindowsMutex: nsJSIID<nsIWindowsMutex>;
+    nsIWindowsMutexFactory: nsJSIID<nsIWindowsMutexFactory>;
+    nsIGeolocationUIUtilsWin: nsJSIID<nsIGeolocationUIUtilsWin>;
+    nsIWindowsShellService: nsJSIID<nsIWindowsShellService, typeof nsIWindowsShellService_LaunchOnLoginEnabledEnumerator>;
+    nsIWinTaskSchedulerService: nsJSIID<nsIWinTaskSchedulerService>;
+    nsIJumpListBuilder: nsJSIID<nsIJumpListBuilder>;
+    nsITaskbarOverlayIconController: nsJSIID<nsITaskbarOverlayIconController>;
+    nsITaskbarPreview: nsJSIID<nsITaskbarPreview>;
+    nsITaskbarPreviewButton: nsJSIID<nsITaskbarPreviewButton>;
+    nsITaskbarPreviewCallback: nsJSIID<nsITaskbarPreviewCallback>;
+    nsITaskbarPreviewController: nsJSIID<nsITaskbarPreviewController>;
+    nsITaskbarProgress: nsJSIID<nsITaskbarProgress>;
+    nsITaskbarTabPreview: nsJSIID<nsITaskbarTabPreview>;
+    nsITaskbarWindowPreview: nsJSIID<nsITaskbarWindowPreview>;
+    nsIWinTaskbar: nsJSIID<nsIWinTaskbar>;
+    nsIWindowsUIUtils: nsJSIID<nsIWindowsUIUtils>;
+    nsIWindowsPackageManager: nsJSIID<nsIWindowsPackageManager>;
+    nsIWindowsRegKey: nsJSIID<nsIWindowsRegKey>;
+    nsIWinAppHelper: nsJSIID<nsIWinAppHelper>;
+  }
+} // global
+
+// Typedefs from xpidl.
+type PRTime = i64;
+type nsTaskbarProgressState = i32;
+
+// XPCOM internal utility types.
+
+/** XPCOM inout param is passed in as a js object with a value property. */
+type InOutParam<T> = { value: T };
+
+/** XPCOM out param is written to the passed in object's value property. */
+type OutParam<T> = { value?: T };
+
+/** Enable interfaces to inherit from enums: pick variants as optional. */
+type Enums<enums> = Partial<Pick<enums, keyof enums>>;
+
+/** Callable accepts either form of a [function] interface. */
+type Callable<iface> = iface | Extract<iface[keyof iface], Function>;
+
+export {};
--- a/src/zen/@types/lib.gecko.xpcom.d.ts
+++ b/src/zen/@types/lib.gecko.xpcom.d.ts
--- a/src/zen/@types/lib.gecko.xpidl.d.ts
+++ b/src/zen/@types/lib.gecko.xpidl.d.ts
@@ -0,0 +1,49 @@
+/**
+ * Gecko XPIDL base types.
+ */
+
+/**
+ * Generic IDs are created by most code which passes a nsID to js.
+ * https://searchfox.org/mozilla-central/source/js/xpconnect/src/XPCJSID.cpp#24
+ */
+interface nsID<uuid = string> {
+  readonly number: uuid;
+}
+
+/**
+ * In addition to nsID, interface IIDs support instanceof type guards,
+ * and expose constants defined on the class, including variants from enums.
+ * https://searchfox.org/mozilla-central/source/js/xpconnect/src/XPCJSID.cpp#45
+ */
+type nsJSIID<iface, enums = {}> = nsID &
+  Constants<iface> &
+  enums & {
+    new (_: never): void;
+    prototype: iface;
+  };
+
+/** A union type of all known interface IIDs. */
+type nsIID = nsIXPCComponents_Interfaces[keyof nsIXPCComponents_Interfaces];
+
+/** A generic to resolve QueryInterface return type from a nsIID. */
+type nsQIResult<iid> = iid extends { prototype: infer U } ? U : never;
+
+/** Picks only const number properties from T. */
+type Constants<T> = { [K in keyof T as IfConst<K, T[K]>]: T[K] };
+
+/** Resolves only for keys K whose corresponding type T is a narrow number. */
+type IfConst<K, T> = T extends number ? (number extends T ? never : K) : never;
+
+/** u32 */
+type nsresult = u32;
+
+// Numeric typedefs, useful as a quick reference in method signatures.
+type double = number;
+type float = number;
+type i16 = number;
+type i32 = number;
+type i64 = number;
+type u16 = number;
+type u32 = number;
+type u64 = number;
+type u8 = number;
--- a/src/zen/@types/zen.d.ts
+++ b/src/zen/@types/zen.d.ts
@@ -0,0 +1,441 @@
+/**
+ * NOTE: Do not modify this file by hand.
+ * Content was generated from source .webidl files.
+ */
+/**
+ * This file from https://phabricator.services.mozilla.com/D209620,
+ * the source of https://bugzilla.mozilla.org/show_bug.cgi?id=1895418
+ * Currently https://searchfox.org/mozilla-central/source/tools/%40types
+ * in 2024-12-28 21:05 KST
+ */
+
+/// <reference types="../lib.gecko.xpcom.d.ts" />
+/// <reference types="../lib.gecko.services.d.ts" />
+/// <reference types="../lib.gecko.dom.d.ts" />
+/// <reference types="../lib.gecko.tweaks.d.ts" />
+/// <reference types="../lib.gecko.nsresult.d.ts" />
+
+declare var window: Window;
+declare var Components: nsIXPCComponents;
+declare var Cu: nsIXPCComponents_Utils;
+declare var Ci: nsIXPCComponents_Interfaces;
+declare var Services: JSServices;
+declare var Cc: nsIXPCComponents_Classes & {
+  [key: string]: {
+    getService: (t: (typeof Ci)[keyof typeof Ci]) => any;
+    createInstance: (aClass: (typeof Ci)[keyof typeof Ci]) => any;
+  };
+};
+interface CSSStyleDeclaration {
+  display: string;
+  flex: string;
+  order: string;
+  flexDirection: string;
+  flexTemplateAreas: string;
+  height: string;
+  animation: string;
+}
+
+interface nsIXPCComponents extends nsISupports {
+  readonly interfaces: nsIXPCComponents_Interfaces;
+  readonly results: nsIXPCComponents_Results;
+  isSuccessCode(result: any): boolean;
+  readonly classes: nsIXPCComponents_Classes;
+  readonly stack: nsIStackFrame;
+  readonly manager: nsIComponentManager;
+  readonly utils: nsIXPCComponents_Utils;
+  readonly ID: nsIXPCComponents_ID;
+  readonly Exception: any;
+  readonly Constructor: (aClass: any, aIID: any, aFlags: any) => any;
+  returnCode: any;
+}
+
+/**
+ * TS-TODO - Needs typing.
+ *
+ * This file contains type stubs for loading things from Gecko. All of these
+ * types should be used in the correct places eventually.
+ */
+
+/**
+ * Namespace anything that has its types mocked out here. These definitions are
+ * only "good enough" to get the type checking to pass in this directory.
+ * Eventually some more structured solution should be found. This namespace is
+ * global and makes sure that all the definitions inside do not clash with
+ * naming.
+ */
+declare namespace MockedExports {
+  /**
+   * This interface teaches ChromeUtils.importESModule how to find modules.
+   */
+  interface KnownModules {
+    Services: typeof import('Services');
+    'resource://gre/modules/AppConstants.sys.mjs': typeof import('resource://gre/modules/AppConstants.sys.mjs');
+    'resource:///modules/CustomizableUI.sys.mjs': typeof import('resource:///modules/CustomizableUI.sys.mjs');
+    'resource:///modules/CustomizableWidgets.sys.mjs': typeof import('resource:///modules/CustomizableWidgets.sys.mjs');
+  }
+
+  interface ChromeUtils {
+    /**
+     * This function reads the KnownModules and resolves which import to use.
+     * If you are getting the TS2345 error:
+     *
+     *  Argument of type '"resource:///.../file.sys.mjs"' is not assignable to
+     *  parameter of type
+     *
+     * Then add the file path to the KnownModules above.
+     */
+    importESModule: <S extends keyof KnownModules>(module: S) => KnownModules[S];
+    defineESModuleGetters: (target: any, mappings: any) => void;
+  }
+
+  interface MessageManager {
+    loadFrameScript(url: string, flag: boolean): void;
+    sendAsyncMessage: (event: string, data: any) => void;
+    addMessageListener: (event: string, listener: (event: any) => void) => void;
+  }
+
+  // This is the thing in window.gBrowser, defined in
+  // https://searchfox.org/mozilla-central/source/browser/base/content/tabbrowser.js
+  interface Browser {
+    addWebTab: (url: string, options: any) => BrowserTab;
+    contentPrincipal: any;
+    selectedTab: BrowserTab;
+    selectedBrowser?: ChromeBrowser;
+    messageManager: MessageManager;
+    ownerDocument?: ChromeDocument;
+    tabs: BrowserTab[];
+  }
+
+  interface BrowserGroup {
+    readonly tabs: BrowserTab[];
+    readonly group?: BrowserGroup;
+  }
+
+  // This is a tab in a browser, defined in
+  // https://searchfox.org/mozilla-central/rev/6b8a3f804789fb865f42af54e9d2fef9dd3ec74d/browser/base/content/tabbrowser.js#2580
+  interface BrowserTab extends XULElement {
+    linkedBrowser: ChromeBrowser;
+    readonly group?: BrowserGroup;
+  }
+
+  interface BrowserWindow extends Window {
+    gBrowser: Browser;
+    focus(): void;
+  }
+
+  // The thing created in https://searchfox.org/mozilla-central/rev/6b8a3f804789fb865f42af54e9d2fef9dd3ec74d/browser/base/content/tabbrowser.js#2088
+  // This is linked to BrowserTab.
+  interface ChromeBrowser {
+    browsingContext?: BrowsingContext;
+    browserId: number;
+  }
+
+  interface BrowsingContext {
+    /**
+     * A unique identifier for the browser element that is hosting this
+     * BrowsingContext tree. Every BrowsingContext in the element's tree will
+     * return the same ID in all processes and it will remain stable regardless of
+     * process changes. When a browser element's frameloader is switched to
+     * another browser element this ID will remain the same but hosted under the
+     * under the new browser element.
+     * We are using this identifier for getting the active tab ID and passing to
+     * the profiler back-end. See `getActiveBrowserID` for the usage.
+     */
+    browserId: number;
+  }
+
+  type GetPref<T> = (prefName: string, defaultValue?: T) => T;
+  type SetPref<T> = (prefName: string, value?: T) => T;
+  type nsIPrefBranch = {
+    clearUserPref: (prefName: string) => void;
+    getStringPref: GetPref<string>;
+    setStringPref: SetPref<string>;
+    getCharPref: GetPref<string>;
+    setCharPref: SetPref<string>;
+    getIntPref: GetPref<number>;
+    setIntPref: SetPref<number>;
+    getBoolPref: GetPref<boolean>;
+    setBoolPref: SetPref<boolean>;
+    addObserver: (aDomain: string, aObserver: PrefObserver, aHoldWeak?: boolean) => void;
+    removeObserver: (aDomain: string, aObserver: PrefObserver) => void;
+  };
+
+  type PrefObserverFunction = (aSubject: nsIPrefBranch, aTopic: 'nsPref:changed', aData: string) => unknown;
+  type PrefObserver = PrefObserverFunction | { observe: PrefObserverFunction };
+
+  interface nsIURI {}
+
+  interface SharedLibrary {
+    start: number;
+    end: number;
+    offset: number;
+    name: string;
+    path: string;
+    debugName: string;
+    debugPath: string;
+    breakpadId: string;
+    arch: string;
+  }
+
+  interface ProfileGenerationAdditionalInformation {
+    sharedLibraries: SharedLibrary[];
+  }
+
+  interface ProfileAndAdditionalInformation {
+    profile: ArrayBuffer;
+    additionalInformation?: ProfileGenerationAdditionalInformation;
+  }
+
+  type Services = {
+    env: {
+      set: (name: string, value: string) => void;
+      get: (name: string) => string;
+      exists: (name: string) => boolean;
+    };
+    prefs: nsIPrefBranch;
+    profiler: {
+      StartProfiler: (
+        entryCount: number,
+        interval: number,
+        features: string[],
+        filters?: string[],
+        activeTabId?: number,
+        duration?: number
+      ) => void;
+      StopProfiler: () => void;
+      IsPaused: () => boolean;
+      Pause: () => void;
+      Resume: () => void;
+      IsSamplingPaused: () => boolean;
+      PauseSampling: () => void;
+      ResumeSampling: () => void;
+      GetFeatures: () => string[];
+      getProfileDataAsync: (sinceTime?: number) => Promise<object>;
+      getProfileDataAsArrayBuffer: (sinceTime?: number) => Promise<ArrayBuffer>;
+      getProfileDataAsGzippedArrayBuffer: (sinceTime?: number) => Promise<ProfileAndAdditionalInformation>;
+      IsActive: () => boolean;
+      sharedLibraries: SharedLibrary[];
+    };
+    platform: string;
+    obs: {
+      addObserver: (observer: object, type: string) => void;
+      removeObserver: (observer: object, type: string) => void;
+    };
+    wm: {
+      getMostRecentWindow: (name: string) => BrowserWindow;
+      getMostRecentNonPBWindow: (name: string) => BrowserWindow;
+    };
+    focus: {
+      activeWindow: BrowserWindow;
+    };
+    io: {
+      newURI(url: string): nsIURI;
+    };
+    scriptSecurityManager: any;
+    startup: {
+      quit: (optionsBitmask: number) => void;
+      eForceQuit: number;
+      eRestart: number;
+    };
+  };
+
+  const EventEmitter: {
+    decorate: (target: object) => void;
+  };
+
+  const AppConstantsSYSMJS: {
+    AppConstants: {
+      platform: string;
+    };
+  };
+
+  interface BrowsingContextStub {}
+  interface PrincipalStub {}
+
+  interface WebChannelTarget {
+    browsingContext: BrowsingContextStub;
+    browser: Browser;
+    eventTarget: null;
+    principal: PrincipalStub;
+  }
+
+  interface FaviconData {
+    uri: nsIURI;
+    dataLen: number;
+    data: number[];
+    mimeType: string;
+    size: number;
+  }
+
+  const PlaceUtilsSYSMJS: {
+    PlacesUtils: {
+      promiseFaviconData: (pageUrl: string | URL | nsIURI, preferredWidth?: number) => Promise<FaviconData>;
+      // TS-TODO: Add the rest.
+    };
+  };
+
+  // TS-TODO
+  const CustomizableUISYSMJS: any;
+  const CustomizableWidgetsSYSMJS: any;
+  const PanelMultiViewSYSMJS: any;
+
+  const LoaderESM: {
+    require: (path: string) => any;
+  };
+
+  const Services: Services;
+
+  // This class is needed by the Cc importing mechanism. e.g.
+  // Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+  class nsIFilePicker {}
+
+  interface FilePicker {
+    init: (browsingContext: BrowsingContext, title: string, mode: number) => void;
+    open: (callback: (rv: number) => unknown) => void;
+    // The following are enum values.
+    modeGetFolder: number;
+    returnOK: number;
+    file: {
+      path: string;
+    };
+  }
+
+  interface Cc {
+    '@mozilla.org/filepicker;1': {
+      createInstance(instance: nsIFilePicker): FilePicker;
+    };
+  }
+
+  interface Ci {
+    nsIFilePicker: nsIFilePicker;
+  }
+
+  interface Cu {
+    exportFunction: (fn: Function, scope: object, options?: object) => void;
+    cloneInto: (value: any, scope: object, options?: object) => void;
+    isInAutomation: boolean;
+  }
+
+  interface FluentLocalization {
+    /**
+     * This function sets the attributes data-l10n-id and possibly data-l10n-args
+     * on the element.
+     */
+    setAttributes(target: Element, id?: string, args?: Record<string, string>): void;
+  }
+}
+
+interface PathUtilsInterface {
+  split: (path: string) => string[];
+  isAbsolute: (path: string) => boolean;
+}
+
+declare module 'Services' {
+  export = MockedExports.Services;
+}
+
+declare module 'ChromeUtils' {
+  export = ChromeUtils;
+}
+
+declare var ChromeUtils: MockedExports.ChromeUtils;
+
+declare var PathUtils: PathUtilsInterface;
+
+// These global objects can be used directly in JSM files only.
+declare var Cu: MockedExports.Cu;
+declare var Cc: MockedExports.Cc;
+declare var Ci: MockedExports.Ci;
+declare var Services: MockedExports.Services;
+
+/**
+ * This is a variant on the normal Document, as it contains chrome-specific properties.
+ */
+declare interface ChromeDocument extends Document {
+  /**
+   * Create a XUL element of a specific type. Right now this function
+   * only refines iframes, but more tags could be added.
+   */
+  createXULElement: ((type: 'iframe') => XULIframeElement) & ((type: string) => XULElement);
+
+  /**
+   * This is a fluent instance connected to this document.
+   */
+  l10n: MockedExports.FluentLocalization;
+}
+
+/**
+ * This is a variant on the HTMLElement, as it contains chrome-specific properties.
+ */
+declare interface ChromeHTMLElement extends HTMLElement {
+  ownerDocument: ChromeDocument;
+}
+
+declare interface XULIframeElement extends XULElement {
+  contentWindow: Window;
+  src: string;
+}
+
+// `declare interface Window` is TypeScript way to let us implicitely extend and
+// augment the already existing Window interface defined in the TypeScript library.
+// This makes it possible to define properties that exist in the window object
+// while in a privileged context. We assume that all of the environments we run
+// in this project will be pribileged, that's why we take this shortcut of
+// globally extending the Window type.
+// See the ChromeOnly attributes in https://searchfox.org/mozilla-central/rev/896042a1a71066254ceb5291f016ca3dbca21cb7/dom/webidl/Window.webidl#391
+//
+// openWebLinkIn and openTrustedLinkIn aren't in all privileged windows, but
+// they're also defined in the privileged environments we're dealing with in
+// this project, so they're defined here for convenience.
+declare interface Window {
+  browsingContext: MockedExports.BrowsingContext;
+  openWebLinkIn: (
+    url: string,
+    where: 'current' | 'tab' | 'tabshifted' | 'window' | 'save',
+    options?: Partial<{
+      // Not all possible options are present, please add more if/when needed.
+      userContextId: number;
+      forceNonPrivate: boolean;
+      relatedToCurrent: boolean;
+      resolveOnContentBrowserCreated: (contentBrowser: MockedExports.ChromeBrowser) => unknown;
+    }>
+  ) => void;
+  openTrustedLinkIn: (
+    url: string,
+    where: 'current' | 'tab' | 'tabshifted' | 'window' | 'save',
+    options?: Partial<{
+      // Not all possible options are present, please add more if/when needed.
+      userContextId: number;
+      forceNonPrivate: boolean;
+      relatedToCurrent: boolean;
+      resolveOnContentBrowserCreated: (contentBrowser: MockedExports.ChromeBrowser) => unknown;
+    }>
+  ) => void;
+}
+
+declare class ChromeWorker extends Worker {}
+
+declare interface MenuListElement extends XULElement {
+  value: string;
+  disabled: boolean;
+}
+
+declare interface XULCommandEvent extends Event {
+  target: XULElement;
+}
+
+declare interface XULElementWithCommandHandler {
+  addEventListener: (type: 'command', handler: (event: XULCommandEvent) => void, isCapture?: boolean) => void;
+  removeEventListener: (type: 'command', handler: (event: XULCommandEvent) => void, isCapture?: boolean) => void;
+}
+
+declare type nsIPrefBranch = MockedExports.nsIPrefBranch;
+
+// chrome context-only DOM isInstance method
+// XXX: This hackishly extends Function because there is no way to extend DOM constructors.
+// Callers should manually narrow the type when needed.
+// See also https://github.com/microsoft/TypeScript-DOM-lib-generator/issues/222
+interface Function {
+  isInstance(obj: any): boolean;
+}
--- a/src/zen/common/ZenCustomizableUI.sys.mjs
+++ b/src/zen/common/ZenCustomizableUI.sys.mjs
@@ -35,7 +35,7 @@ export var ZenCustomizableUI = new (class {
  }

  _addSidebarButtons(window) {
-    const toolbox = window.document.getElementById('navigator-toolbox');
+    const toolbox = window.gNavToolbox;

    // Set a splitter to navigator-toolbox
    const splitter = window.document.createXULElement('splitter');
--- a/src/zen/common/ZenStartup.mjs
+++ b/src/zen/common/ZenStartup.mjs
@@ -117,8 +117,7 @@
      const kElementsToAppend = ['sidebar-splitter', 'sidebar-box'];

      const browser = document.getElementById('browser');
-      const toolbox = document.getElementById('navigator-toolbox');
-      browser.prepend(toolbox);
+      browser.prepend(gNavToolbox);

      const sidebarPanelWrapper = document.getElementById('tabbrowser-tabbox');
      for (let id of kElementsToAppend) {
--- a/src/zen/common/ZenUIManager.mjs
+++ b/src/zen/common/ZenUIManager.mjs
@@ -28,7 +28,7 @@ var gZenUIManager = {
        gZenCompactModeManager.getAndApplySidebarWidth.bind(gZenCompactModeManager),
        this.sidebarHeightThrottle
      )
-    ).observe(document.getElementById('navigator-toolbox'));
+    ).observe(gNavToolbox);

    SessionStore.promiseAllWindowsRestored.then(() => {
      this._hasLoadedDOM = true;
@@ -322,11 +322,7 @@ var gZenVerticalTabsManager = {
  },

  get navigatorToolbox() {
-    if (this._navigatorToolbox) {
-      return this._navigatorToolbox;
-    }
-    this._navigatorToolbox = document.getElementById('navigator-toolbox');
-    return this._navigatorToolbox;
+    return gNavToolbox;
  },

  initRightSideOrderContextMenu() {
@@ -678,7 +674,7 @@ var gZenVerticalTabsManager = {

  _updateMaxWidth() {
    const maxWidth = Services.prefs.getIntPref('zen.view.sidebar-expanded.max-width');
-    const toolbox = document.getElementById('navigator-toolbox');
+    const toolbox = gNavToolbox;
    if (!this._prefsCompactMode) {
      toolbox.style.maxWidth = `${maxWidth}px`;
    } else {
--- a/src/zen/compact-mode/ZenCompactMode.mjs
+++ b/src/zen/compact-mode/ZenCompactMode.mjs
@@ -88,10 +88,7 @@ var gZenCompactModeManager = {
  },

  get sidebar() {
-    if (!this._sidebar) {
-      this._sidebar = document.getElementById('navigator-toolbox');
-    }
-    return this._sidebar;
+    return gNavToolbox;
  },

  flashSidebarIfNecessary(aInstant = false) {
--- a/src/zen/tabs/ZenPinnedTabManager.mjs
+++ b/src/zen/tabs/ZenPinnedTabManager.mjs
@@ -294,9 +294,6 @@
          }
          gBrowser.tabContainer._invalidateCachedTabs();
          newTab.initialize();
-          if (!ZenWorkspaces.essentialShouldShowTab(newTab)) {
-            gBrowser.hideTab(newTab, undefined, true);
-          }
        } catch (ex) {
          console.error('Failed to initialize pinned tabs:', ex);
        }
@@ -650,6 +647,11 @@
        this.onTabIconChanged(tab);
      }
      gZenUIManager.updateTabsToolbar();
+      // Dispatch the event to update the UI
+      const event = new CustomEvent('TabAddedToEssentials', {
+        detail: { tab },
+      });
+      tab.dispatchEvent(event);
    }

    removeEssentials(tab, unpin = true) {
@@ -670,6 +672,11 @@
        }
      }
      gZenUIManager.updateTabsToolbar();
+      // Dispatch the event to update the UI
+      const event = new CustomEvent('TabRemovedFromEssentials', {
+        detail: { tab },
+      });
+      tab.dispatchEvent(event);
    }

    _insertItemsIntoTabContextMenu() {
@@ -729,7 +736,7 @@
      try {
        const pinnedTabsTarget =
          event.target.closest('#vertical-pinned-tabs-container') || event.target.closest('.zen-current-workspace-indicator');
-        const essentialTabsTarget = event.target.closest('#zen-essentials-container');
+        const essentialTabsTarget = event.target.closest('.zen-essentials-container');
        const tabsTarget = event.target.closest('#tabbrowser-arrowscrollbox');
        // Remove group labels from the moving tabs and replace it
        // with the sub tabs
@@ -803,7 +810,7 @@
              if (tabsTarget === gBrowser.tabs.at(-1)) {
                newIndex++;
              }
-              gBrowser.moveTabTo(draggedTab, newIndex, { forceStandaloneTab: true });
+              gBrowser.moveTabTo(draggedTab, { tabIndex: newIndex, forceUngrouped: true });
            }
          }
        }
@@ -913,7 +920,7 @@

    applyDragoverClass(event, draggedTab) {
      const pinnedTabsTarget = event.target.closest('#vertical-pinned-tabs-container');
-      const essentialTabsTarget = event.target.closest('#zen-essentials-container');
+      const essentialTabsTarget = event.target.closest('.zen-essentials-container');
      const tabsTarget = event.target.closest('#tabbrowser-arrowscrollbox');
      let targetTab = event.target.closest('.tabbrowser-tab');
      targetTab = targetTab?.group || targetTab;
--- a/src/zen/tabs/zen-tabs.css
+++ b/src/zen/tabs/zen-tabs.css
@@ -5,7 +5,6 @@
 */
 /* Styles for both vertical and horizontal tabs */
@import url('chrome://browser/content/zen-styles/zen-tabs/vertical-tabs.css');
-@import url('chrome://browser/content/zen-styles/zen-tabs/horizontal-tabs.css');

 #zen-tabbox-wrapper {
  position: relative;
--- a/src/zen/tabs/zen-tabs/horizontal-tabs.css
+++ b/src/zen/tabs/zen-tabs/horizontal-tabs.css
@@ -1,335 +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/.
- */
-@media not -moz-pref('zen.tabs.vertical') {
-  :root #browser {
-    display: flex !important;
-    flex-direction: column !important;
-  }
-
-  & #navigator-toolbox {
-    display: flex !important;
-    flex-direction: row !important;
-    max-width: unset !important;
-    min-width: unset !important;
-    width: 100% !important;
-    padding: var(--zen-toolbox-padding) !important;
-  }
-
-  #tabbrowser-tabs {
-    display: -webkit-box !important;
-    -webkit-box-orient: horizontal;
-    -webkit-box-pack: start;
-    max-width: 10000px !important;
-
-    --tabstrip-min-height: calc(var(--tab-min-height) - 4 * var(--tab-block-margin));
-    --tab-min-height: 10px !important;
-  }
-
-  .vertical-pinned-tabs-container-separator {
-    display: none !important;
-  }
-
-  #zen-essentials-container,
-  #vertical-pinned-tabs-container,
-  #tabbrowser-arrowscrollbox {
-    -webkit-box-flex: 1;
-  }
-
-  #vertical-pinned-tabs-container:empty {
-    -webkit-box-flex: 0 !important;
-    width: 0 !important;
-    padding: 0 !important;
-    margin: 0 !important;
-    border: none !important;
-    visibility: collapse !important;
-  }
-  #navigator-toolbox {
-    flex-direction: row !important;
-    align-items: center;
-  }
-
-  #titlebar {
-    flex-direction: row !important;
-    width: 100%;
-    height: 36px !important;
-  }
-
-  #zen-essentials-container {
-    --tab-min-height: 36px !important;
-    display: flex !important;
-    flex-direction: row !important;
-    padding-inline-end: 0 !important;
-  }
-
-  #vertical-pinned-tabs-container {
-    display: flex !important;
-    flex-direction: row !important;
-    padding-inline-end: 0 !important;
-  }
-
-  #zen-essentials-container .tabbrowser-tab {
-    width: 0% !important;
-  }
-
-  #vertical-pinned-tabs-container .tabbrowser-tab {
-    width: 0% !important;
-  }
-
-  .tabbrowser-tab[zen-glance-tab='true'] {
-    .tab-label-container {
-      display: none !important;
-      width: 0px !important;
-      max-width: 0px !important;
-    }
-  }
-
-  #tabbrowser-arrowscrollbox {
-    display: flex !important;
-    max-width: -moz-available;
-    overflow: hidden !important;
-  }
-
-  #TabsToolbar {
-    flex-direction: row !important;
-    gap: 8px;
-    overflow: hidden !important;
-    display: flex !important;
-  }
-
-  #TabsToolbar-customization-target {
-    flex-direction: row !important;
-  }
-
-  #tabbrowser-tabs[orient='vertical'] {
-    flex-direction: row !important;
-  }
-
-  tabs {
-    flex-direction: row !important;
-  }
-
-  #zen-essentials-container {
-    container-name: tab-container;
-    container-type: normal;
-    max-width: 36px !important;
-    flex: 1 1 36px !important;
-  }
-  #vertical-pinned-tabs-container {
-    container-name: tab-container;
-    container-type: normal;
-    max-width: 36px !important;
-    min-width: 36px !important;
-    flex: 1 1 36px !important;
-  }
-
-  #vertical-pinned-tabs-container .tab-close-button {
-    display: none !important;
-  }
-
-  #vertical-pinned-tabs-container .tab-reset-button {
-    display: none !important;
-  }
-
-  #vertical-pinned-tabs-container .tab-label-container {
-    display: none !important;
-  }
-
-  #vertical-pinned-tabs-container .tab-icon-image {
-    margin: 0 !important;
-  }
-
-  .tabbrowser-tab {
-    container-name: tab-container;
-    container-type: normal;
-    min-width: 40px !important;
-    flex: 1 1 150px !important;
-    width: -moz-available;
-
-    &:is(:hover, [visuallyselected]) .tab-close-button {
-      display: block;
-      --tab-inline-padding: 0; /* Avoid weird padding */
-      margin-inline-end: 0 !important;
-    }
-  }
-
-  .tabbrowser-tab[selected] {
-    flex: 2 0 150px !important;
-  }
-
-  @container tab-container (max-width: 80px) {
-    .tab-close-button {
-      margin-right: 0px !important;
-    }
-    .tab-icon-image {
-      padding: 0 !important;
-      margin-left: min(2.5px, 5%) !important;
-      margin-right: min(10px, 5%) !important;
-    }
-    .tab-label-container,
-    .tab-content {
-      margin: 0 !important;
-      padding-left: min(8px, 5%) !important;
-      padding-right: min(8px, 5%) !important;
-    }
-  }
-
-  @container tab-container (max-width: 44px) {
-    .tab-label-container {
-      display: none !important;
-    }
-    .tab-content {
-      justify-content: space-around !important;
-    }
-    .tab-close-button {
-      display: none !important;
-    }
-    .tabbrowser-tab[selected] {
-      & .tab-icon-image,
-      .tab-icon-stack {
-        display: none !important;
-      }
-      & .tab-content {
-        justify-content: space-around !important;
-        padding: 0 !important;
-      }
-      .tab-close-button {
-        display: block !important;
-      }
-    }
-  }
-
-  #vertical-pinned-tabs-container::after {
-    z-index: -1;
-    content: '';
-    position: absolute;
-    right: 0;
-    width: 1px;
-    height: 45%;
-    top: 50%;
-    transform: translateY(-50%);
-    background: hsl(255, 10%, 100%);
-  }
-
-  /* Other UI Elements */
-  .zen-current-workspace-indicator {
-    display: none !important;
-  }
-
-  #zen-sidebar-splitter {
-    display: none !important;
-  }
-
-  #tabbrowser-tabpanels {
-    padding-left: var(--zen-element-separation) !important;
-  }
-
-  #appcontent * {
-    overflow: visible !important;
-  }
-
-  #TabsToolbar-customization-target::after {
-    display: none !important;
-  }
-
-  #zen-sidebar-bottom-buttons {
-    width: auto !important;
-    padding: 0 !important;
-  }
-
-  /* Height Adjustments */
-  #vertical-pinned-tabs-container,
-  #zen-essentials-container,
-  #tabbrowser-arrowscrollbox {
-    max-height: none !important;
-  }
-
-  #PanelUI-zen-gradient-generator {
-    min-width: 390px !important;
-  }
-
-  #zen-essentials-container:not(:empty),
-  #vertical-pinned-tabs-container:not(:empty),
-  #tabbrowser-arrowscrollbox {
-    -webkit-box-flex: 1;
-    min-width: min-content;
-    width: auto !important;
-  }
-
-  #vertical-pinned-tabs-container:not(:empty) {
-    display: -webkit-box !important;
-    -webkit-box-orient: horizontal;
-    min-width: fit-content !important;
-    width: fit-content !important;
-    position: relative;
-    margin-right: -1px !important;
-  }
-
-  #vertical-pinned-tabs-container:not(:empty) .tabbrowser-tab {
-    position: relative;
-    display: -webkit-box !important;
-  }
-
-  #tabbrowser-arrowscrollbox {
-    margin-left: 0 !important;
-  }
-
-  #vertical-pinned-tabs-container:empty,
-  #zen-essentials-container:empty {
-    -webkit-box-flex: 0 !important;
-    width: 0 !important;
-    min-width: 0 !important;
-    padding: 0 !important;
-    margin: 0 !important;
-    border: none !important;
-    visibility: collapse !important;
-  }
-
-  #nav-bar {
-    width: unset !important;
-    min-width: 500px !important;
-  }
-
-  #tabbrowser-arrowscrollbox-periphery {
-    margin: 0 !important;
-  }
-
-  hbox#nav-bar-customization-target toolbarbutton.chromeclass-toolbar-additional:nth-of-type(1) {
-    padding-inline-start: var(--toolbar-start-end-padding) !important;
-  }
-
-  toolbar#PersonalToolbar {
-    padding-left: 6px !important;
-  }
-
-  .tab-context-line {
-    width: 100% !important;
-    height: 3px !important;
-  }
-
-  .tabbrowser-tab[zen-glance-tab='true'] {
-    flex-basis: fit-content !important;
-    max-width: 36px !important;
-  }
-
-  #zen-essentials-container .tabbrowser-tab[zen-glance-tab='true'] {
-    left: 2px;
-  }
-
-  #vertical-pinned-tabs-container .tabbrowser-tab[zen-glance-tab='true'] {
-    position: absolute !important;
-  }
-
-  #TabsToolbar-customization-target toolbarbutton,
-  #TabsToolbar-customization-target toolbarpaletteitem {
-    -webkit-box-flex: 0 !important;
-    min-width: min-content;
-    width: auto !important;
-
-    .toolbarbutton-text {
-      display: none !important;
-    }
-  }
-}
--- a/src/zen/tabs/zen-tabs/vertical-tabs.css
+++ b/src/zen/tabs/zen-tabs/vertical-tabs.css
@@ -497,7 +497,7 @@
    position: relative;
  }

-  & #zen-essentials-container {
+  & #zen-essentials-wrapper {
    --tab-min-height: 44px;
  }

@@ -650,7 +650,7 @@
    opacity: .4;
    align-items: center;
  }
-  & #zen-essentials-container {
+  & .zen-essentials-container {
    justify-content: center;
  }
  & #vertical-tabs-newtab-button {
@@ -1045,24 +1045,31 @@


 /* Mark: Essentials Toolbar */
-#zen-essentials-container {
+#zen-essentials-wrapper {
+  margin-left: calc(-1 * var(--zen-toolbox-padding));
+  min-width: calc(100% + var(--zen-toolbox-padding) * 2);
+}
+
+.zen-essentials-container {
  padding-bottom: var(--zen-toolbox-padding);
  overflow: hidden;
  gap: calc(var(--zen-toolbox-padding) - 2px);
-}
-
-#zen-essentials-container {
-  overflow: hidden;
  transition: max-height 0.3s ease-out;
  opacity: 1;
  grid-template-columns: repeat(auto-fit, minmax(49px, auto));
  overflow: hidden;
  scrollbar-width: thin;
+  min-width: calc(100% + var(--zen-toolbox-padding) * 2);
+  padding: 0 var(--zen-toolbox-padding);
+
  display: grid;
-  padding: 0;
+  &[hidden='true'] {
+    opacity: 0;
+    pointer-events: none;
+  }
 }

-#zen-essentials-container > .tabbrowser-tab,
+.zen-essentials-container > .tabbrowser-tab,
 #zen-welcome-initial-essentials-browser-sidebar-essentials .tabbrowser-tab {
  --toolbarbutton-inner-padding: 0;
  max-width: unset;
@@ -1240,15 +1247,6 @@
  }
 }

-/* Horizontal tabs reordering indicators */
-#zen-essentials-container .tabbrowser-tab.drag-over-before {
-  box-shadow: 3px 0 6px -2px var(--toolbarbutton-active-background, rgba(0, 255, 0, 0.2));
-}
-
-#zen-essentials-container .tabbrowser-tab.drag-over-after {
-  box-shadow: -3px 0 6px -2px var(--toolbarbutton-active-background, rgba(0, 255, 0, 0.2));
-}
-
 /* Renaming tabs */
 .tab-label-container-editing {
  display: none !important;
@@ -1267,9 +1265,12 @@
 .zen-workspace-tabs-section {
  position: absolute;
  transform: translateX(-100%);
-  min-width: calc(100% - var(--zen-toolbox-padding) * 2);

-  &:not(.zen-current-workspace-indicator) {
+  &:not(.zen-essentials-container) {
+    min-width: calc(100% - var(--zen-toolbox-padding) * 2);
+  }
+
+  &:not(.zen-current-workspace-indicator):not(.zen-essentials-container) {
    margin: 0 var(--zen-toolbox-padding);
  }
 }
--- a/src/zen/vendor/motion.min.mjs
+++ b/src/zen/vendor/motion.min.mjs
--- a/src/zen/workspaces/ZenWorkspaces.mjs
+++ b/src/zen/workspaces/ZenWorkspaces.mjs
@@ -73,9 +73,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
      'zen.workspaces.open-new-tab-if-last-unpinned-tab-is-closed',
      false
    );
-    XPCOMUtils.defineLazyPreferenceGetter(
-      this,
-      'containerSpecificEssentials',
+    this.containerSpecificEssentials = Services.prefs.getBoolPref(
      'zen.workspaces.container-specific-essentials-enabled',
      false
    );
@@ -172,6 +170,12 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
      }
      this._pinnedTabsResizeObserver.observe(element);
    }
+    for (let element of document.getElementById('zen-essentials-wrapper').children) {
+      if (element.classList.contains('tabbrowser-tab')) {
+        continue;
+      }
+      this._pinnedTabsResizeObserver.observe(element);
+    }
  }

  get activeWorkspaceStrip() {
@@ -218,7 +222,6 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
      const defaultSelectedContainer = document.querySelector(
        `#tabbrowser-arrowscrollbox .zen-workspace-tabs-section[zen-workspace-id="${this.activeWorkspace}"]`
      );
-      const essentialsContaienr = document.getElementById('zen-essentials-container');
      // New profile with no workspaces does not have a default selected container
      if (defaultSelectedContainer) {
        const pinnedContainer = document.querySelector(
@@ -226,7 +229,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
        );
        for (const tab of tabs) {
          if (tab.hasAttribute('zen-essential')) {
-            essentialsContaienr.appendChild(tab);
+            this.getEssentialsSection(tab).appendChild(tab);
            continue;
          } else if (tab.pinned) {
            pinnedContainer.insertBefore(tab, pinnedContainer.lastChild);
@@ -244,7 +247,31 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    this._fixIndicatorsNames(workspaces);
  }

-  _createWorkspaceSection(workspace) {
+  getEssentialsSection(container = 0) {
+    if (typeof container !== 'number') {
+      container = container?.getAttribute('usercontextid');
+    }
+    container ??= 0;
+    if (!this.containerSpecificEssentials) {
+      container = 0;
+    }
+    let essentialsContainer = document.querySelector(`.zen-essentials-container[container="${container}"]:not([clone])`);
+    if (!essentialsContainer) {
+      essentialsContainer = document.createXULElement('vbox');
+      essentialsContainer.className = 'zen-essentials-container zen-workspace-tabs-section';
+      essentialsContainer.setAttribute('flex', '1');
+      essentialsContainer.setAttribute('container', container);
+      document.getElementById('zen-essentials-wrapper').appendChild(essentialsContainer);
+    }
+    return essentialsContainer;
+  }
+
+  getCurrentEssentialsContainer() {
+    const currentWorkspace = this.activeWorkspace;
+    return this.getEssentialsSection(currentWorkspace?.containerTabId);
+  }
+
+  #createWorkspaceSection(workspace) {
    const section = document.createXULElement('vbox');
    section.className = 'zen-workspace-tabs-section';
    section.setAttribute('flex', '1');
@@ -254,11 +281,11 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {

  async _createWorkspaceTabsSection(workspace, tabs, perifery) {
    const container = gBrowser.tabContainer.arrowScrollbox;
-    const section = this._createWorkspaceSection(workspace);
+    const section = this.#createWorkspaceSection(workspace);
    container.appendChild(section);

    const pinnedContainer = document.getElementById('vertical-pinned-tabs-container');
-    const pinnedSection = this._createWorkspaceSection(workspace);
+    const pinnedSection = this.#createWorkspaceSection(workspace);
    this._organizeTabsToWorkspaceSections(workspace, section, pinnedSection, tabs);
    section.appendChild(perifery.cloneNode(true));
    pinnedSection.appendChild(
@@ -268,7 +295,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    );
    pinnedContainer.appendChild(pinnedSection);

-    const workspaceIndicator = this._createWorkspaceSection(workspace);
+    const workspaceIndicator = this.#createWorkspaceSection(workspace);
    workspaceIndicator.classList.add('zen-current-workspace-indicator');
    workspaceIndicator.appendChild(window.MozXULElement.parseXULToFragment(this.workspaceIndicatorXUL));
    document.getElementById('zen-current-workspace-indicator-container').appendChild(workspaceIndicator);
@@ -319,11 +346,12 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
  }

  get _hoveringSidebar() {
-    return document.getElementById('navigator-toolbox').hasAttribute('zen-has-hover');
+    return gNavToolbox.hasAttribute('zen-has-hover');
  }

  _handleAppCommand(event) {
-    if (!this.workspaceEnabled || !this._hoveringSidebar) {
+    // note: Dont use this._hoveringSidebar as it's not as reliable as checking for :hover
+    if (!this.workspaceEnabled || !gNavToolbox.matches(':hover')) {
      return;
    }

@@ -344,7 +372,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
  }

  _setupSidebarHandlers() {
-    const toolbox = document.getElementById('navigator-toolbox');
+    const toolbox = gNavToolbox;

    const scrollCooldown = 200; // Milliseconds to wait before allowing another scroll
    const scrollThreshold = 2; // Minimum scroll delta to trigger workspace change
@@ -395,7 +423,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {

  initializeGestureHandlers() {
    const elements = [
-      document.getElementById('navigator-toolbox'),
+      gNavToolbox,
      // event handlers do not work on elements inside shadow DOM so we need to attach them directly
      document.getElementById('tabbrowser-arrowscrollbox').shadowRoot.querySelector('scrollbox'),
    ];
@@ -601,8 +629,11 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
      this._initializeWorkspaceTabContextMenus();
      await this.workspaceBookmarks();
      window.addEventListener('TabBrowserInserted', this.onTabBrowserInserted.bind(this));
-      window.addEventListener('TabOpen', this.updateTabsContainers.bind(this));
-      window.addEventListener('TabClose', this.updateTabsContainers.bind(this));
+      const tabUpdateListener = this.updateTabsContainers.bind(this);
+      window.addEventListener('TabOpen', tabUpdateListener);
+      window.addEventListener('TabClose', tabUpdateListener);
+      window.addEventListener('TabAddedToEssentials', tabUpdateListener);
+      window.addEventListener('TabRemovedFromEssentials', tabUpdateListener);
      let activeWorkspace = await this.getActiveWorkspace();
      this.activeWorkspace = activeWorkspace?.uuid;
      try {
@@ -629,7 +660,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    if (this._initialTab) {
      this.moveTabToWorkspace(this._initialTab, this.activeWorkspace);
      gBrowser.selectedTab = this._initialTab;
-      gBrowser.moveTabTo(this._initialTab, 0, { forceStandaloneTab: true });
+      gBrowser.moveTabTo(this._initialTab, { forceUngrouped: true, tabIndex: 0 });
      this._initialTab._possiblyEmpty = false;
      this._initialTab = null;
    }
@@ -1591,22 +1622,13 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
      await this._organizeWorkspaceStripLocations(previousWorkspace);
    }

-    // First pass: Handle tab visibility and workspace ID assignment
-    const prevTabUsed = this._processTabVisibility(window.uuid, containerId, workspaces, onInit);
-
    // Second pass: Handle tab selection
    this.tabContainer._invalidateCachedTabs();
-    const tabToSelect = await this._handleTabSelection(
-      window,
-      onInit,
-      containerId,
-      workspaces,
-      previousWorkspace.uuid,
-      prevTabUsed
-    );
+    const tabToSelect = await this._handleTabSelection(window, onInit, previousWorkspace.uuid);

    // Update UI and state
-    await this._updateWorkspaceState(window, onInit, tabToSelect);
+    const previousWorkspaceIndex = workspaces.workspaces.findIndex((w) => w.uuid === previousWorkspace.uuid);
+    await this._updateWorkspaceState(window, onInit, tabToSelect, { previousWorkspaceIndex, previousWorkspace });
  }

  _moveEmptyTabToWorkspace(workspaceUuid) {
@@ -1632,9 +1654,28 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    }
  }

-  _updateMarginTopPinnedTabs(arrowscrollbox, pinnedContainer) {
-    if (arrowscrollbox) {
-      arrowscrollbox.style.marginTop = pinnedContainer.getBoundingClientRect().height + 'px';
+  _updateMarginTopPinnedTabs(arrowscrollbox, pinnedContainer, essentialContainer, workspaceIndicator) {
+    if (arrowscrollbox && !pinnedContainer.hasAttribute('hidden')) {
+      const essentialsHeight = essentialContainer.getBoundingClientRect().height;
+      pinnedContainer.style.marginTop = essentialsHeight + 'px';
+      workspaceIndicator.style.marginTop = essentialsHeight + 'px';
+      const arrowMarginTop = pinnedContainer.getBoundingClientRect().height + essentialsHeight + 'px';
+      if (!true) {
+        // TODO:
+        gZenUIManager.motion.animate(
+          arrowscrollbox,
+          {
+            marginTop: [arrowscrollbox.style.marginTop, arrowMarginTop],
+          },
+          {
+            type: 'spring',
+            bounce: 0,
+            duration: 0.2,
+          }
+        );
+      } else {
+        arrowscrollbox.style.marginTop = arrowMarginTop;
+      }
    }
  }

@@ -1656,6 +1697,15 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
        }
      }
    }
+    // Hide other essentials with different containerTabId
+    const otherContainersEssentials = document.querySelectorAll(`#zen-essentials-wrapper .zen-workspace-tabs-section`);
+    for (const container of otherContainersEssentials) {
+      if (container.getAttribute('container') != workspace.containerTabId && this.containerSpecificEssentials) {
+        container.setAttribute('hidden', 'true');
+      } else {
+        container.removeAttribute('hidden');
+      }
+    }
  }

  updateWorkspaceIndicator(currentWorkspace, workspaceIndicator) {
@@ -1683,12 +1733,45 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    }
  }

-  async _animateTabs(newWorkspace, shouldAnimate, tabToSelect = null) {
+  async _animateTabs(
+    newWorkspace,
+    shouldAnimate,
+    tabToSelect = null,
+    { previousWorkspaceIndex = null, previousWorkspace = null } = {}
+  ) {
+    const kGlobalAnimationDuration = 0.3;
    this._animatingChange = true;
    const animations = [];
    const workspaces = await this._workspaces();
    const newWorkspaceIndex = workspaces.workspaces.findIndex((w) => w.uuid === newWorkspace.uuid);
+    const isGoingLeft = newWorkspaceIndex <= previousWorkspaceIndex;
+    const clonedEssentials = [];
+    if (shouldAnimate && this.containerSpecificEssentials) {
+      for (const workspace of workspaces.workspaces) {
+        const essentialsContainer = this.getEssentialsSection(workspace.containerTabId);
+        if (clonedEssentials[clonedEssentials.length - 1]?.contextId == workspace.containerTabId) {
+          clonedEssentials[clonedEssentials.length - 1].repeat++;
+          clonedEssentials[clonedEssentials.length - 1].workspaces.push(workspace);
+          continue;
+        }
+        essentialsContainer.setAttribute('hidden', 'true');
+        const essentialsClone = essentialsContainer.cloneNode(true);
+        essentialsClone.removeAttribute('hidden');
+        essentialsClone.setAttribute('cloned', 'true');
+        clonedEssentials.push({
+          container: essentialsClone,
+          workspaces: [workspace],
+          contextId: workspace.containerTabId,
+          originalContainer: essentialsContainer,
+          repeat: 0,
+        });
+        essentialsContainer.parentNode.appendChild(essentialsClone);
+      }
+    }
    for (const element of document.querySelectorAll('.zen-workspace-tabs-section')) {
+      if (element.classList.contains('zen-essentials-container')) {
+        continue;
+      }
      const existingTransform = element.style.transform;
      const elementWorkspaceId = element.getAttribute('zen-workspace-id');
      const elementWorkspaceIndex = workspaces.workspaces.findIndex((w) => w.uuid === elementWorkspaceId);
@@ -1705,7 +1788,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
            {
              type: 'spring',
              bounce: 0,
-              duration: 0.3,
+              duration: kGlobalAnimationDuration,
            }
          )
        );
@@ -1719,101 +1802,127 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
        element.removeAttribute('active');
      }
    }
-    await Promise.all(animations);
-    this._animatingChange = false;
-  }
+    if (this.containerSpecificEssentials) {
+      // Animate essentials
+      const newWorkspaceEssentialsContainer = clonedEssentials.find((cloned) =>
+        cloned.workspaces.some((w) => w.uuid === newWorkspace.uuid)
+      );
+      for (const cloned of clonedEssentials) {
+        const container = cloned.container;
+        const essentialsWorkspacess = cloned.workspaces;
+        const repeats = cloned.repeat;
+        // Animate like the workspaces above expect essentials are a bit more
+        // complicated because they are not based on workspaces but on containers
+        // So, if we have the following arangement:
+        //  | [workspace1] [workspace2] [workspace3] [workspace4]
+        //  | [container1] [container1] [container2] [container1]
+        // And if we are changing from workspace 1 to workspace 4,
+        // we should be doing the following:
+        // First container (repeat 2 times) will stay in place until
+        // we reach container 3, then animate to the left and container 2
+        // also move to the left after that while container 1 in workspace 4
+        // will slide in from the right

-  _processTabVisibility(workspaceUuid, containerId, workspaces, onInit) {
-    const hiddenTabs = [];
-    const visibleTabs = gBrowser.tabContainer.visibleTabs;
-    for (const tab of gBrowser.tabs) {
-      if (!this._shouldShowTab(tab, workspaceUuid, containerId, workspaces)) {
-        hiddenTabs.push(tab);
-      } else if (tab.hasAttribute('zen-essential')) {
-        gBrowser.showTab(tab, undefined, true);
-      }
-    }
-    // If there's no more visible tabs, make a new tab visible
-    // or if ALL the visible tabs are essentials or we have our selected
-    // tab hidden, select a new tab
-    let prevTabUsed = null;
-    if (
-      (hiddenTabs.length === visibleTabs.length ||
-        visibleTabs.every((tab) => tab.getAttribute('zen-essential') === 'true') ||
-        hiddenTabs.includes(gBrowser.selectedTab)) &&
-      gZenVerticalTabsManager._canReplaceNewTab &&
-      !onInit
-    ) {
-      prevTabUsed = gBrowser.selectedTab;
-      this.selectEmptyTab(null, false);
-    }
-    for (const tab of hiddenTabs) {
-      gBrowser.hideTab(tab, undefined, true);
-    }
-    return prevTabUsed;
-  }
-
-  // Only use it in gZenPinnedTabsManager, when initializing essential tabs
-  essentialShouldShowTab(tab) {
-    if (tab.getAttribute('zen-essential') !== 'true') {
-      return true;
-    }
-    const workspaces = this._workspaceCache;
-    if (!workspaces) {
-      return true;
-    }
-    const containerId = (
-      workspaces.workspaces.find((workspace) => workspace.uuid === this.activeWorkspace) || {}
-    )?.containerTabId?.toString();
-    return this._shouldShowTab(tab, this.activeWorkspace, containerId, workspaces);
-  }
-
-  _shouldShowTab(tab, workspaceUuid, containerId, workspaces) {
-    const isEssential = tab.getAttribute('zen-essential') === 'true';
-    const tabWorkspaceId = tab.getAttribute('zen-workspace-id');
-    const tabContextId = tab.getAttribute('usercontextid');
-
-    if (tab.hasAttribute('zen-glance-tab')) {
-      return true; // Always show glance tabs
-    }
-
-    // Handle essential tabs
-    if (isEssential) {
-      if (!this.containerSpecificEssentials) {
-        return true; // Show all essential tabs when containerSpecificEssentials is false
-      }
-
-      if (containerId) {
-        // In workspaces with default container: Show essentials that match the container
-        return tabContextId === containerId;
-      } else {
-        // In workspaces without a default container: Show essentials that aren't in container-specific workspaces
-        // or have usercontextid="0" or no usercontextid
-        return (
-          !tabContextId ||
-          tabContextId === '0' ||
-          !workspaces.workspaces.some((workspace) => workspace.containerTabId === parseInt(tabContextId, 10))
+        // Get the index from first and last workspace
+        const firstWorkspaceIndex = workspaces.workspaces.findIndex((w) => w.uuid === essentialsWorkspacess[0].uuid);
+        const lastWorkspaceIndex = workspaces.workspaces.findIndex(
+          (w) => w.uuid === essentialsWorkspacess[essentialsWorkspacess.length - 1].uuid
        );
+        let stepsInBetween = Math.abs(newWorkspaceIndex - (isGoingLeft ? firstWorkspaceIndex : lastWorkspaceIndex)) + 1;
+        const usingSameContainer =
+          newWorkspaceEssentialsContainer.workspaces.some((w) => w.uuid === newWorkspace.uuid) &&
+          newWorkspaceEssentialsContainer.workspaces.some((w) => w.uuid === previousWorkspace.uuid);
+        let newOffset =
+          -(
+            newWorkspaceIndex -
+            (isGoingLeft ? firstWorkspaceIndex : lastWorkspaceIndex) +
+            (!isGoingLeft ? repeats - 1 : -repeats + 1)
+          ) * 100;
+
+        let existingOffset =
+          -(
+            newWorkspaceIndex -
+            (isGoingLeft ? lastWorkspaceIndex : firstWorkspaceIndex) +
+            (isGoingLeft ? repeats - 1 : -repeats + 1)
+          ) * 100;
+
+        const needsOffsetAdjustment = stepsInBetween > essentialsWorkspacess.length || usingSameContainer;
+
+        if (repeats > 0 && needsOffsetAdjustment) {
+          if (!isGoingLeft) {
+            if (existingOffset !== 0) existingOffset += 100;
+            if (newOffset !== 0) newOffset += 100;
+          } else {
+            if (existingOffset !== 0) existingOffset -= 100;
+            if (newOffset !== 0) newOffset -= 100;
+          }
+        }
+
+        // Special case: going forward from single reused container to a new one
+        if (!usingSameContainer && !isGoingLeft && lastWorkspaceIndex === newWorkspaceIndex - 1) {
+          existingOffset = 0;
+          newOffset = -100;
+          stepsInBetween = 1;
+        }
+        if (!usingSameContainer && isGoingLeft && firstWorkspaceIndex === newWorkspaceIndex + 1) {
+          existingOffset = 0;
+          newOffset = 100;
+          stepsInBetween = 1;
+        }
+        if (
+          !usingSameContainer &&
+          isGoingLeft &&
+          (firstWorkspaceIndex === newWorkspaceIndex - 1 || firstWorkspaceIndex === newWorkspaceIndex)
+        ) {
+          existingOffset = -100;
+          newOffset = 0;
+          stepsInBetween = 1;
+        }
+        if (!usingSameContainer && !isGoingLeft && firstWorkspaceIndex === newWorkspaceIndex) {
+          existingOffset = 100;
+          newOffset = 0;
+          stepsInBetween = 1;
+        }
+
+        const newTransform = `translateX(${newOffset}%)`;
+        const existingTransform = `translateX(${existingOffset}%)`;
+        if (shouldAnimate) {
+          container.style.transform = newTransform;
+          animations.push(
+            gZenUIManager.motion.animate(
+              container,
+              {
+                transform: [existingTransform, new Array(stepsInBetween).fill(newTransform).join(',')],
+              },
+              {
+                type: 'spring',
+                bounce: 0,
+                duration: kGlobalAnimationDuration,
+              }
+            )
+          );
+        }
      }
    }
-
-    // For non-essential tabs (both normal and pinned)
-    if (!tabWorkspaceId) {
-      // Assign workspace ID to tabs without one
-      this.moveTabToWorkspace(tab, workspaceUuid);
-      return true;
+    await Promise.all(animations);
+    if (shouldAnimate) {
+      for (const cloned of clonedEssentials) {
+        cloned.container.remove();
+      }
    }
-
-    // Show if tab belongs to current workspace
-    return tabWorkspaceId === workspaceUuid;
+    const essentialsContainer = this.getEssentialsSection(newWorkspace.containerTabId);
+    essentialsContainer.removeAttribute('hidden');
+    essentialsContainer.style.transform = 'none';
+    gBrowser.tabContainer._invalidateCachedTabs();
+    this._animatingChange = false;
  }

  _shouldChangeToTab(aTab) {
    return !(aTab?.hasAttribute('zen-essential') || (aTab?.pinned && aTab?.hasAttribute('pending')));
  }

-  async _handleTabSelection(window, onInit, containerId, workspaces, previousWorkspaceId, prevTabUsed) {
-    const currentSelectedTab = prevTabUsed || gBrowser.selectedTab;
+  async _handleTabSelection(window, onInit, previousWorkspaceId) {
+    const currentSelectedTab = gBrowser.selectedTab;
    const oldWorkspaceId = previousWorkspaceId;
    const lastSelectedTab = this._lastSelectedWorkspaceTabs[window.uuid];

@@ -1824,7 +1933,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {

    let tabToSelect = null;
    // Try last selected tab if it is visible
-    if (lastSelectedTab && this._shouldShowTab(lastSelectedTab, window.uuid, containerId, workspaces)) {
+    if (lastSelectedTab) {
      tabToSelect = lastSelectedTab;
    }
    // Find first suitable tab
@@ -1852,17 +1961,11 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    // Always make sure we always unselect the tab from the old workspace
    if (currentSelectedTab && currentSelectedTab !== tabToSelect) {
      currentSelectedTab._selected = false;
-      if (
-        !this._shouldShowTab(currentSelectedTab, window.uuid, containerId, workspaces) &&
-        currentSelectedTab.hasAttribute('zen-essential')
-      ) {
-        gBrowser.hideTab(currentSelectedTab, undefined, true);
-      }
    }
    return tabToSelect;
  }

-  async _updateWorkspaceState(workspace, onInit, tabToSelect) {
+  async _updateWorkspaceState(workspace, onInit, tabToSelect, { previousWorkspaceIndex, previousWorkspace } = {}) {
    // Update document state
    document.documentElement.setAttribute('zen-workspace-id', workspace.uuid);

@@ -1871,13 +1974,16 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {

    // Update workspace UI
    await this._updateWorkspacesChangeContextMenu();
-    gZenUIManager.updateTabsToolbar();
+    // gZenUIManager.updateTabsToolbar();
    await this._propagateWorkspaceData({ clearCache: false });

    gZenThemePicker.onWorkspaceChange(workspace);

    document.getElementById('zen-tabs-wrapper').style.scrollbarWidth = 'none';
-    await this._animateTabs(workspace, !onInit && !this._animatingChange, tabToSelect);
+    await this._animateTabs(workspace, !onInit && !this._animatingChange, tabToSelect, {
+      previousWorkspaceIndex,
+      previousWorkspace,
+    });
    await this._organizeWorkspaceStripLocations(workspace, true);
    document.getElementById('zen-tabs-wrapper').style.scrollbarWidth = '';

@@ -2007,17 +2113,39 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
    }
  }

-  onPinnedTabsResize(entries) {
+  async onPinnedTabsResize(entries) {
    if (!this._hasInitializedTabsStrip) {
      return;
    }
    for (const entry of entries) {
-      const workspaceId = entry.target.getAttribute('zen-workspace-id');
-      const arrowScrollbox = document.querySelector(
-        `#tabbrowser-arrowscrollbox .zen-workspace-tabs-section[zen-workspace-id="${workspaceId}"]`
-      );
-      this._updateMarginTopPinnedTabs(arrowScrollbox, entry.target);
-      this.updateShouldHideSeparator(arrowScrollbox, entry.target);
+      const originalWorkspaceId = entry.target.getAttribute('zen-workspace-id');
+      const workspacesIds = [];
+      if (entry.target.closest('#zen-essentials-wrapper')) {
+        // Get all workspaces that have the same userContextId
+        const activeWorkspace = await this.getActiveWorkspace();
+        const userContextId = activeWorkspace.containerTabId;
+        const workspaces = this._workspaceCache.workspaces.filter(
+          (w) => w.containerTabId === userContextId && w.uuid !== originalWorkspaceId
+        );
+        workspacesIds.push(...workspaces.map((w) => w.uuid));
+      } else {
+        workspacesIds.push(originalWorkspaceId);
+      }
+      for (const workspaceId of workspacesIds) {
+        const arrowScrollbox = document.querySelector(
+          `#tabbrowser-arrowscrollbox .zen-workspace-tabs-section[zen-workspace-id="${workspaceId}"]`
+        );
+        const pinnedContainer = document.querySelector(
+          `#vertical-pinned-tabs-container .zen-workspace-tabs-section[zen-workspace-id="${workspaceId}"]`
+        );
+        const workspaceIndicator = document.querySelector(
+          `#zen-current-workspace-indicator-container .zen-workspace-tabs-section[zen-workspace-id="${workspaceId}"]`
+        );
+        const workspaceObject = this._workspaceCache.workspaces.find((w) => w.uuid === workspaceId);
+        const essentialContainer = this.getEssentialsSection(workspaceObject.containerTabId);
+        this._updateMarginTopPinnedTabs(arrowScrollbox, pinnedContainer, essentialContainer, workspaceIndicator);
+        this.updateShouldHideSeparator(arrowScrollbox, pinnedContainer);
+      }
    }
  }

@@ -2096,7 +2224,7 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
        continue;
      }
      if (tab.getAttribute('zen-essential') === 'true') {
-        const container = document.getElementById('zen-essentials-container');
+        const container = this.getCurrentEssentialsContainer();
        container.appendChild(tab);
        changed = true;
        continue;
@@ -2353,15 +2481,18 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {

    const tabs = [];
    // we need to go through each tab in each container
-    const essentialsContainer = document.getElementById('zen-essentials-container');
+    const essentialsContainer = document.querySelectorAll('#zen-essentials-wrapper .zen-workspace-tabs-section');
    let pinnedContainers = document.querySelectorAll('#vertical-pinned-tabs-container .zen-workspace-tabs-section');
    let normalContainers = document.querySelectorAll('#tabbrowser-arrowscrollbox .zen-workspace-tabs-section');
    if (!this._hasInitializedTabsStrip) {
      pinnedContainers = [document.getElementById('vertical-pinned-tabs-container')];
      normalContainers = [this.activeWorkspaceStrip];
    }
-    const containers = [essentialsContainer, ...pinnedContainers, ...normalContainers];
+    const containers = [...essentialsContainer, ...pinnedContainers, ...normalContainers];
    for (const container of containers) {
+      if (container.hasAttribute('cloned')) {
+        continue;
+      }
      for (const tab of container.children) {
        if (tab.tagName === 'tab') {
          tabs.push(tab);
--- a/src/zen/workspaces/ZenWorkspacesStorage.mjs
+++ b/src/zen/workspaces/ZenWorkspacesStorage.mjs
@@ -195,7 +195,7 @@ var ZenWorkspacesStorage = {
      name: row.getResultByName('name'),
      icon: row.getResultByName('icon'),
      default: !!row.getResultByName('is_default'),
-      containerTabId: row.getResultByName('container_id'),
+      containerTabId: row.getResultByName('container_id') ?? 0,
      position: row.getResultByName('position'),
      theme: row.getResultByName('theme_type')
        ? {
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,113 @@
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig to read more about this file */
+
+    /* Projects */
+    // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
+    // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
+    // "tsBuildInfoFile": "./.tsbuildinfo",              /* Specify the path to .tsbuildinfo incremental compilation file. */
+    // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects. */
+    // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
+    // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
+
+    /* Language and Environment */
+    "target": "es2016" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
+    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    // "jsx": "preserve",                                /* Specify what JSX code is generated. */
+    // "libReplacement": true,                           /* Enable lib replacement. */
+    // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
+    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
+    // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
+    // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */
+    // "reactNamespace": "",                             /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */
+    // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
+    // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
+    // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
+
+    /* Modules */
+    "module": "commonjs" /* Specify what module code is generated. */,
+    // "rootDir": "./",                                  /* Specify the root folder within your source files. */
+    // "moduleResolution": "node10",                     /* Specify how TypeScript looks up a file from a given module specifier. */
+    // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
+    // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
+    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
+    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
+    // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
+    // "allowImportingTsExtensions": true,               /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */
+    // "rewriteRelativeImportExtensions": true,          /* Rewrite '.ts', '.tsx', '.mts', and '.cts' file extensions in relative import paths to their JavaScript equivalent in output files. */
+    // "resolvePackageJsonExports": true,                /* Use the package.json 'exports' field when resolving package imports. */
+    // "resolvePackageJsonImports": true,                /* Use the package.json 'imports' field when resolving imports. */
+    // "customConditions": [],                           /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
+    // "noUncheckedSideEffectImports": true,             /* Check side effect imports. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files. */
+    // "allowArbitraryExtensions": true,                 /* Enable importing files with any extension, provided a declaration file is present. */
+    // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
+
+    /* JavaScript Support */
+    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
+    // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
+    // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
+
+    /* Emit */
+    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
+    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
+    // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
+    // "outDir": "./",                                   /* Specify an output folder for all emitted files. */
+    // "removeComments": true,                           /* Disable emitting comments. */
+    // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
+    // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
+    // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
+    // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
+    // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
+    // "stripInternal": true,                            /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
+    // "noEmitHelpers": true,                            /* Disable generating custom helper functions like '__extends' in compiled output. */
+    // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
+    // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
+    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+
+    /* Interop Constraints */
+    // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
+    // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
+    // "isolatedDeclarations": true,                     /* Require sufficient annotation on exports so other tools can trivially generate declaration files. */
+    // "erasableSyntaxOnly": true,                       /* Do not allow runtime constructs that are not part of ECMAScript. */
+    // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
+    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
+    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
+    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
+
+    /* Type Checking */
+    "strict": true /* Enable all strict type-checking options. */,
+    // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                         /* When type checking, take into account 'null' and 'undefined'. */
+    // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    // "strictBindCallApply": true,                      /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
+    // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "strictBuiltinIteratorReturn": true,              /* Built-in iterators are instantiated with a 'TReturn' type of 'undefined' instead of 'any'. */
+    // "noImplicitThis": true,                           /* Enable error reporting when 'this' is given the type 'any'. */
+    // "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
+    // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
+    // "noUnusedLocals": true,                           /* Enable error reporting when local variables aren't read. */
+    // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read. */
+    // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
+    // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    // "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
+    // "noUncheckedIndexedAccess": true,                 /* Add 'undefined' to a type when accessed using an index. */
+    // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
+    // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type. */
+    // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
+    // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
+
+    /* Completeness */
+    // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
+  }
+}