1.21.9b
Release build - 1.21.9b (2026-07-25)
Added 4
- High Dynamic Range (HDR) video playback is now available on Windows with HDR mode enabled in Windows Settings
- Support for merging multiple PDFs by dragging a PDF into the PDF sidebar
- Support for Apple's system-wide full-screen keyboard command (Globe-F)
- Verification and display of Qualified Website Authentication Certificates (QWACs) in accordance with eIDAS regulations
Changed 3
- Updated Firefox to 153.0
- Improved UI for container selection and management
- Improved support for videos with overlays to more easily access video actions from context menus
Fixed 3
- Fixed 'Add tab to essentials' context menu item being always disabled
- Fixed external links not being routed properly by Space Routing
- Fixed boosts size override not persisting
Security 1
- Applied security fixes from Mozilla security advisory MFSA2026-68
Zen Stable Release
Security
New Features
- Updated Firefox to 153.0
- High Dynamic Range (HDR) video playback is now available on Windows - this feature needs HDR mode enabled for the display in Windows Settings - Display.
- Improved UI for container selection and management
- It is now possible to merge multiple PDFs by dragging a PDF into the PDF sidebar.
- Added support for Apple's system-wide full-screen keyboard command (Globe-F).
- Zen now verifies and displays Qualified Website Authentication Certificates (QWACs) in accordance with eIDAS regulations.
- Added improved support for videos with overlays so users can more easily access video actions from context menus.