Mozilla pushed Firefox Nightly 153.0a1 on May 19, 2026. The firefox 153.0.1 release notes are actually for a nightly version, indicating a maintenance release. No specific user-facing changes appeared in the official documentation. Backend improvements and bug fixes remain the core of this update.
This Nightly release is recommended for early adopters testing upcoming Firefox features. Upgrade to evaluate the new capabilities like JPEG XL support and redesigned Settings. If you rely on stable performance, wait for the final release.
What Changed
- New features: Added Apple Globe-F support, QR code sharing, image insertion in PDFs, video overlay improvements, redesigned Settings, QWAC verification, color picker quick action, and more.
- Changed: PDF sharing on Android now sends the file instead of URL. Extensions require explicit local file access permission. HTML parsing rules for
- Fixed: Multiple bug fixes across rendering, extensions, and web platform features.
Why It Matters
- This maintenance release delivers backend stability improvements. No new final features affect everyday browsing.
Who Should Upgrade
This release targets developer and beta testers running Firefox Nightly. If you test new web platform features like JPEG XL or the redesigned Settings, upgrade now. Stable channel users should skip until the official release.
How to Upgrade
- Open Firefox Nightly.
- Click the menu button and select Help.
- Choose About Firefox Nightly.
- Wait for the update to download automatically.
- Restart the browser to apply changes.
Usage Examples
- Generate a QR code for any open tab: right-click the tab, select Share > Generate QR Code.
- Quickly pick a color from a page: type “eyedropper” in the address bar and select the quick action.
- Merge PDFs: drag a PDF file into the PDF sidebar to combine them.
Known Issues
- No known issues reported in the official release notes.
Feature Flow
Official Release Notes
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