Phoenix 2026.02.16.1

NOTE FOR NIX USERS: Phoenix's default branch is now set to dev. To continue receiving updates for production, please ensure you specify the pages branch. The Installation instructions have been updated to reflect this, so you can see more details on what specifically you should change there. Apologies for any inconvenience.

Changes

• Disabled all AI functionality with the new browser.ai.control prefs by default.
• Disabled arbitrary content script execution for moz-extension documents by default (Currently for Nightly).
• Disabled the EfficientCanvasRandomization FPP target to work-around an upstream bug that prevents canvas randomization from properly applying everywhere as expected.
• Disabled JavaScript async stack tracing by default.
• Disabled shared memory and atomics for JavaScript/WebAssembly by default.
• Enabled local network access restrictions for IP addresses in the 192.18. range by default.
• Fixed an issue that prevented embeds for certain sites, such as YouTube, from working as expected.
  • Thanks to degausser! <3
• Removed several old/no longer used preferences.
  • Thanks to any1here! <3
• Disabled Nimbus Rollouts (Remote Improvements - used for A/B testing).
• Other tweaks, fixes, and enhancements.

Android-only

• Blocked websites from prompting to access apps and services on your device (localhost) by default.
• Blocked websites from prompting to access the local network by default.
• Disabled the RDD process and re-enabled the Android Media Codec module by default to resolve memory safety issues and ensure that media playback continues to work as expected.
• Fixed an issue that prevented tel links from opening in the Dialer app.

Desktop-only

• Disabled the Firefox "AI" (Local machine learning) Runtime by default.
• Re-enabled prompts for websites to access apps and services on your device (localhost) by default.
• Re-enabled the ability to toggle the menu bar with the alt key by default.
• Re-enabled taskbar lists/tasks for Windows users by default.

Codeberg: See here for more details.

GitLab: See here for more details.

GitHub: See here for more details.

:)