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May 27th, 2025 14:41
Updates 5/27/25 - Firefox
Firefox Release Version 139.0,
first offered to Release channel users on May 27, 2025
New
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By popular request, Full-Page Translations are now available within Firefox extension pages that start with the
moz-extension://
URL scheme. -
The New Tab custom wallpaper (and colors) option is now available! Your own image can be uploaded as your New Tab wallpaper or any custom color can be selected - from the brightest pink to dark gray. This feature will be rolling out gradually to new users and can also be enabled immediately via Firefox Labs. Additionally, new Wallpaper images and a new Celestial category have also been added.
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Link Previews is currently available as an experimental feature which can be enabled via Firefox Labs in the Firefox settings. After enabling, use the Alt+Shift keyboard shortcut when hovering over a link to see the previews in action!
Fixed
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PNG images with transparency now keep their transparency when pasted into Firefox.
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The upload performance of HTTP/3 has been significantly improved, particularly on resumed connections (QUIC 0-RTT) and high-bandwidth and high-delay connections.
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Various security fixes.
Changed
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Due to recent changes in how Chrome encrypts user data on Windows, the Firefox migration wizard can no longer directly import payment methods or passwords from Chrome. However, users can still export passwords from Chrome to a CSV file and then import them into Firefox using the migration wizard or the password manager.
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The Review Checker feature is shutting down and will no longer be available after June 10, 2025.
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Available via the internal updater: Help / About Firefox