Zen Stable ReleaseSecurityhttps://www.mozilla.org/en-US/security/advisories/mfsa2026-123/New FeaturesUpdated to Firefox 159.0.1New grain options have been added to the theme picker. You can cycle through different grain effects by clicking on the circle inside the dial.FixesFixed 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.ChangesOn 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'