Zen Browser 1.21.9b is a genuinely useful update for Windows users of this privacy-focused, Firefox-based browser known for split views, vertical tabs, and deep customization through Zen Mods.
What's New in Version 1.21.9b
- Firefox updated to 153.0 under the hood, bringing the latest engine improvements and security fixes
- HDR video playback on Windows A first for Zen. Requires HDR mode enabled in Windows Settings > Display
- Improved container tab UI Selecting and managing containers is cleaner now
- Drag-and-drop PDF merging Drop a PDF into the PDF sidebar to merge it with another
- Support for Apple's system-wide full-screen keyboard shortcut (Globe-F) on macOS
- Zen now verifies and displays Qualified Website Authentication Certificates (QWACs) in line with EU eIDAS regulations
- Better handling of videos with overlays, making video controls easier to reach from context menus
Fixed
- "Add tab to essentials" context menu item no longer stays stuck disabled
- External links now route correctly through Space Routing
- Boost size overrides now persist properly between sessions
Worth noting: Zen still doesn't support DRM-protected streaming (Netflix, HBO Max, etc.) since it lacks a Widevine license, unlikely to change unless the project becomes part of a larger company.
About Zen Browser
Zen Browser is a privacy-focused, open-source browser built on Mozilla Firefox. It blocks trackers and ads by default and adds power-user features like Workspaces, Compact Mode, Split Views, and a fast profile switcher, all themeable through community-built Zen Mods.
Download Zen Browser 1.21.9b
- Zen Browser (64-bit) — 91.7 MB, open source
- Zen Browser (ARM64)
- Official site: zen-browser.app
More Information
- [Zen Browser on UpdateStar](https://zen-browser-x64-en-us.updatestar.com/
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