Zen Stable Release

Security

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-123/

New Features

• Updated to Firefox 159.0.1
• New grain options have been added to the theme picker. You can cycle through different grain effects by clicking on the circle inside the dial.

Fixes

• Fixed a command prompt window briefly appearing on Windows when Zen restarts to apply an update.
• Fixed passkey sign-in failing on websites that share passkeys across related sites, such as Facebook and Instagram.
• Fixed crashes on Windows that could occur with some antivirus or other security software installed, in some cases also leaving WebGL disabled.
• Fixed red and blue colors appearing swapped on some websites that use WebGL on Linux, including video call background effects.
• More bug fixes and improvements.

Changes

• On macOS, icons on the UI will now start using SF Symbols.
• The 'About Zen' window has been redesigned.
• 'My Review Request' option for Pull Requests live folder now searches for 'user-review-requested:@me' instead of 'review-requested:@me'