Firefox Beta and Developer Edition
Release Notes

You can now close a Picture-in-Picture window without pausing the video. Press Shift + Click on the close button or use Shift + Esc to exit while keeping playback uninterrupted.

Logins in the Firefox Password Manager are now encrypted using a more modern encryption scheme, switching from 3DES-CBC to AES-256-CBC. This change only affects the local encryption of logins on the disk; logins synced through Firefox Sync are end-to-end encrypted independently and have already been using a strong encryption scheme (AES-256-GCM) previously.

On Windows, when opening a link from another application, Firefox will only use a window on the current virtual desktop or open a new window if needed.

On Firefox for Android, the "Allow screenshots in private browsing" setting has been removed.

Firefox now supports the Element.moveBefore API.

Firefox now supports math-shift compact.

Firefox now supports the WebGPU GPUDevice.importExternalTexture API on Windows.

Firefox now supports PerformanceEventTiming.interactionId, allowing developers to group related input events. This enables support for the Interaction to Next Paint (INP) responsiveness metric.

Firefox now supports the command and commandfor attributes.

Firefox now supports the View Transition API. The View Transition API provides a mechanism for easily creating animated transitions between different website views.

The resizeMode getUserMedia constraint is now available, allowing developers to crop and downscale video captured from a camera to any resolution they choose.

Dithering is now applied when linear-gradient, conic-gradient, and radial-gradient are rendered using hardware WebRender.

Firefox now supports the upsert proposal. This adds getOrInsert and getOrInsertComputed methods to Map and WeakMap. These methods either return the value associated with a key, or insert a default value, and then return that value, simplifying handling of cases where it's not known if a key is already present in the Map or WeakMap.

Firefox now supports the lock() and unlock() methods of ScreenOrientation interface on Windows tablets and Android devices.

Implemented worker transfer for RTCDataChannel.

WebCodecs on Windows now has a batch-encoding path for VideoEncoder, improving performance with higher throughput and lower submission latency due to a larger default batch size.