Firefox Nightly
Release Notes

Say hello to enhanced Picture-in-Picture! Rewind, check video duration, and effortlessly switch to full-screen mode on the web's most popular video websites.

The Awesomebar result menu is now enabled in Firefox Nightly, allowing you to remove history results and dismiss sponsored Firefox Suggest results.

Passwords generated in Firefox now include special characters, making them more secure.

Importing bookmarks from Safari or a Chrome-based browser? The favicons for those bookmarks will now also be imported by default to make them easier to identify.

Starting with Firefox 112, Nightly users on macOS and Linux can now use FIDO2 / WebAuthn authenticators over USB. Some advanced features, such as fully passwordless logins, require a PIN to be set on the authenticator. It is expected to ship to all users in a future release.

The Windows GPU sandbox first shipped in the Firefox 110 release has been tightened to enhance the security benefits it provides.

A 13-year-old feature request was fulfilled, and Firefox now supports files being drag-and-dropped directly from Microsoft Outlook. A special thanks to volunteer contributor Marco Spiess for helping to get this across the finish line!

Mac users can now access macOS Services directly from the context menu.

Websites that use window.print() can now be printed in Firefox for Android.

Firefox for Android now supports hardware accelerated AV1 video decoding by default with supported hardware or via fallback to software decoding.

Following up on the work already shipped on macOS and Linux in Firefox 110, GPU-accelerated Canvas2D is now enabled by default for Firefox for Android also.

On Windows, the elastic overscroll effect is now enabled by default, with two fingers scrolling on touchpad or scrolling on touchscreen, you will see a bouncing animation when scrolling past the edge of a scroll container.

AV1 Image Format files containing animations (AVIS) are now supported, improving Firefox' support for AVIF images across the web.

Removed the long-deprecated mozRTCPeerConnection, mozRTCIceCandidate, and mozRTCSessionDescription types. Sites should utilize the non-prefixed variants instead.

Firefox 113 adds support for a number of WebRTC features for improved interoperability: RTCMediaSourceStats, RTCPeerConnectionState, RTCPeerConnectionStats ("peer-connection" RTCStatsType), RTCRtpSender.setStreams(), and RTCSctpTransport.

Module scripts can now import other ES module scripts on worklets.

Firefox now supports the color functions from the color (level 4) specification. This includes the lab(), lch(), oklab(), oklch() and color() functions.

Starting with Firefox 113, Nightly and early beta builds now behave similar to the other browsers when splitting a node (e.g., typing Enter to split a paragraph) and joining two nodes (e.g., typing Backspace at start of a paragraph to join the paragraph and the previous one) when using the built-in editor. When a node is split, the built-in editor creates new node after the original one, i.e., creates the right node. Similarly, when two nodes are joined, the built-in editor deletes the latter node and moves its children to end of the preceding node.

This new behavior can also be enabled by web apps themselves for all channels with a call of document.execCommand("enableCompatibleJoinSplitDirection", false, "false") (introduced in bug 1810663). This command is available only when designMode is set to "on" or there is at least one editable element which has contenteditable attribute, and the built-in editor has not handled the insertParagraph, delete, or forwardDelete command.

Firefox now supports the scripting CSS media query.

The forced-color-adjust property is now supported, allowing authors to opt an element out of color changes in Forced Color Mode for improved readability where the automatically-picked contrasting colors are not ideal.

Starting with Firefox 113, the WebTransport API is now enabled in the Nightly channel, including RFC 9297 support. It's expected to ship to release in the near future. WebTransport is expected to see widespread use for media delivery and other applications. WebTransport is built on top of QUIC/HTTP3 and provides reliable streams and reliable and unreliable datagrams.