Zen Stable ReleaseSecurityhttps://www.mozilla.org/en-US/security/advisories/mfsa2026-90/New FeaturesUpdated to Firefox 156.0Zen on macOS can now be set to open automatically when the computer starts up, from the Startup section of Settings.Added the following actions to the command bar: 'Expand current view', 'New space', 'Reopen closed tab', 'Duplicate tab', 'Reset pinned tab'.FixesFixed high-sample-rate FLAC audio in MP4 failing to play on certain video sites.Fixed subtitles not appearing in the Picture-in-Picture window when they are turned on in the video player after the window has already opened.Fixed the find bar becoming permanently unavailable in a tab after reversing the panes in Split View.Fixed some sites failing to load when DNS over HTTPS is enabled and the site does not support HTTPS.Fixed an issue on Windows where Zen could block an auto-hiding taskbar from showing.Fixed the sidebar not hiding if the urlbar is open when compact mode is enabled. (#13196)Fixed an issue where cross-space tab routing would freeze the browser under certain conditions. (#14171)Fixed cross-device sync losing certain tabs if they are created too quickly (#15380)Fixed certain issues related to live folders appearing as active even when they are no tabs showing in them.Other bug fixes and improvements.ChangesZen's built-in PDF viewer now starts up to 45% faster.Improved memory and CPU usage when Zen displays large JPEG images scaled down to fit a page.On Windows devices with ARM64 processors, WebRTC video calls may now use hardware H264 decoding instead of falling back to software.Live Folders will now ignore archived issues and pull requests.Improved the look and feel of drag-and-drop interactions for tabs. Specially on MacOS, where the drag-and-drop behavior is now done natively.Folders will now fully-expand if all tabs within them are visible. Folder animations has also been improved for smoother transitions.