Draft: Rebase desktop 11.0 patches onto 91

Closes #40461 (closed)

• 02f0f242 TB3: Tor Browser's official .mozconfigs.
• ee04b5d1 TB4: Tor Browser's Firefox preference overrides.
• 01a09b0a Bug 12620: TorBrowser regression tests
• 5fa7c7d0 Bug 28044: Integrate Tor Launcher into tor-browser
• 47642982 Bug 10760: Integrate TorButton to TorBrowser core
• f91e7e8f Add TorStrings module for localization
• 0763f589 Bug 3547: Block all plugins.
• e51ea662 Bug 12974: Disable NTLM and Negotiate HTTP Auth
• 62fc0992 Bug 16439: Remove screencasting code
• 28b81c11 Bug 13028: Prevent potential proxy bypass cases.
• c6a5f9b3 Bug 9173: Change the default Firefox profile directory to be TBB-relative.
• 4cf9e1ae Bug 14631: Improve profile access error messages.
• 4224ffb1 Bug 13252: Do not store data in the app bundle
• 6a8cc27f Bug 2176: Rebrand Firefox to TorBrowser
• 27396fa1 Bug 16620: Clear window.name when no referrer sent
• 3fff4c34 Bug 18800: Remove localhost DNS lookup in nsProfileLock.cpp
• 9e14f7f3 Bug 18821: Disable libmdns for Android and Desktop
• 1fa8ac7f Bug 19273: Avoid JavaScript patching of the external app helper dialog.
• d69a4fe1 Bug 11641: change TBB directory structure to be more like Firefox's
• 01b3ed01 Bug 21724: Make Firefox and Tor Browser distinct macOS apps
• dcf21efe Bug 19121: reinstate the update.xml hash check
• 14e54d43 Bug 4234: Use the Firefox Update Process for Tor Browser.
• 419c791d Bug 13379: Sign our MAR files.
• 9031cfbd Bug 16940: After update, load local change notes.
• 320bcc72 Omnibox: Add DDG, Startpage, Disconnect, Youtube, Twitter; remove Amazon, eBay, bing
• bd689b3e Bug 16285: Exclude ClearKey system for now
• e003023c Bug 21431: Clean-up system extensions shipped in Firefox
• 75d10900 Bug 21830: Copying large text from web console leaks to /tmp
• 8bbaf487 Bug 23104: Add a default line height compensation
• 983968e1 Bug 25658: Replace security slider with security level UI
• 98346c87 Bug 26353: Prevent speculative connect that violated FPI.
• fcbe5b6d Bug 28369: Stop shipping pingsender executable
• 8d7fb952 Bug 23247: Communicating security expectations for .onion
• 40742f90 Bug 30541: Disable WebGL readPixel() for web content
• f4b3759a Bug 31563: force reloading search extensions if extensions.enabledScopes has changed (Not needed with "Modern Config", afaics)
• 91ada501 Bug 26345: Hide tracking protection UI
• 0cdd542a Bug 31575: Replace Firefox Home (newtab) with about:tor
• 3cedf149 Bug 27511: Add new identity button to toolbar
• 0807e901 Bring back old Firefox onboarding
• cdab3a14 Bug 26961: New user onboarding.
• b3411676 Bug 31607: App menu items stop working on macOS
• 75b411f4 Bug 13543: Spoof smooth and powerEfficient for Media Capabilities (Upstreamed as b68c36a5)
• c62c3312 Bug 31286: Implementation of bridge, proxy, and firewall settings in about:preferences#tor
• dffb6c07 Bug 32092: Fix Tor Browser Support link in preferences
• af88a453 Bug 31740: Remove some unnecessary RemoteSettings instances
• 58b99677 Bug 27604: Fix addon issues when moving TB directory
• 3a62f6cd Bug 32220: Improve the letterboxing experience
• f7273e78 Bug 30237: Add v3 onion services client authentication prompt
• c9d8168a Bug 32658: Create a new MAR signing key
• dc655b52 Bug 24796 - Comment out excess permissions from GeckoView
• 36f4cad5 Orfox: Centralized proxy applied to AbstractCommunicator and BaseResources.
• 4e37110f Bug 25741 - TBA: Disable GeckoNetworkManager
• 001355e2 Bug 28125 - Prevent non-Necko network connections
• 278d6bee Bug 33342: Avoid disconnect search addon error after removal.
• 899e207f Bug 28005: Implement .onion alias urlbar rewrites
• 52335245 Bug 21952: Implement Onion-Location
• d71aa802 Bug 32418: Allow updates to be disabled via an enterprise policy.
• 53bd9798 Bug 33852: Clean up about:logins (LockWise) to avoid mentioning sync, etc.
• 067f76e8 Bug 40025: Remove Mozilla add-on install permissions
• bd9136b1 Bug 40073: Disable remote Public Suffix List fetching
• 53c3d8aa Bug 40002: Remove about:pioneer
• da7434fa Bug 1650281 - P1: Widen gCombinedSizes once the buffers grow r=gerald
• 97e51158 Bug 1650281 - P2: Make sure gCombinedSizes won't be underflowed r=gerald
• 74b07347 Bug 40091: Load HTTPS Everywhere as a builtin addon in desktop
• b4ac13e6 Bug 40166: Disable security.certerrors.mitm.auto_enable_enterprise_roots
• 36fa1d38 Bug 1658881 - When failing to create a channel and an image request, make sure to set the image blocking status appropriately. r=tnikkel
• b89147a8 Bug 1673237 - Always allow SVGs on about: pages r=acat,tjr,emilio
• 0dc2c5df 40209: Implement Basic Crypto Safety
• 1eca93f1 Bug 27476: Implement about:torconnect captive portal within Tor Browser
• 6174b3a8 Bug 40432: Prevent probing installed applications
• d57b4165 Bug 40475: Include clearing CORS preflight cache
• 8201e1f2 Adding issue template for bugs.
• 1eaade2a Bug 40416: Add v2 Onion deprecation warnings
• 73d57c01 fixup! Bug 27476: Implement about:torconnect captive portal within Tor Browser

Bug fixes:

• #40589 (closed)
• torbutton#40042 (closed)
• torbutton#40043 (closed)
• #40591 (closed)
• #40590 (closed)