Release build - 1.21.7b (2026-07-15)

Zen Stable Release

Security

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-67/

New Features

• Updated to Firefox 152.0.6

Fixes

• Fixed essentials promo UI leaving gap on pressing Esc (#14544)
• Fixed misaligned symbolic space icons in Space options menu on Linux (#14495)
• Fixed Spaces switching when dragging tab to another monitor (#14511)
• Fixed tab order flipping when moving tabs between workspaces (#14495)
• Fixed a hang that could occur after using a file picker dialog on macOS 26
• Other bug fixes and improvements.