Zen Stable Release

Security

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-54/

New Features

• Updated to Firefox 151.0.3
• Boosts now support a dark mode UI based on your system dark mode setting.

Fixes

• Fixed auto focus for new windows not working. (#12112)
• Fixed desktop shortcuts showing zen as 'Nightly'. (#13745)
• Other minor bug fixes and performance improvements.