See what landed recently in Firefox Nightly!

Starting with Firefox Nightly 135, the DevTools toolbox colors have been updated to have higher contrast than the regular theme when in High Contrast Mode. Note that this change will only be activated when all of these conditions are met:

• High Contrast Mode is enabled for the system.
• In about:settings, in the Colors popup, Use system colors is checked, and Override the colors specified by the page with your selections above is set to something else than Never.
• In DevTools settings, the selected Theme is Auto.

Starting with Firefox Nightly 134, Firefox can now selectively unblock certain social media embeds in ETP Strict or Private Browsing mode, allowing users to access blocked content without decreasing their overall protection level.

Starting with Firefox for Android 131, HLS playlist support was deprecated in Nightly builds. Extended testing showed no adverse impact as newer playback technologies have been widely adopted by websites.

Starting with Firefox Nightly 135, macOS DMG packages now use LZMA for compression, reducing download size and installation time.

Starting with Firefox 135, Linux binaries are now provided in XZ format, replacing the previous BZ2 format, offering faster unpacking and smaller file sizes. Blog Post

Starting with Firefox Nightly 135, third-party tracking cookies are now protected by Total Cookie Protection instead of being blocked by default.

Starting in Firefox 135, Nightly builds now send a referrer from meta refreshes and Refresh headers, improving compatibility with sites such as Twitch.

Starting with Firefox 135, the Temporal proposal, a better version of Date, is now available for experimentation in Nightly builds behind the javascript.options.experimental.temporal preference. For more details, see https://tc39.es/proposal-temporal/docs/.