1986393 - land initial jpegxl rust code pref disabled
RESOLVED (zondolfin) in Core - Graphics: ImageLib. Last updated 2026-02-27.
Experimental features in Firefox
developer.mozilla.orgThis page lists Firefox's experimental and partially-implemented features, including evolving or proposed web platform standards. Each entry below includes information about the builds in which a feature is included (Nightly, Beta, Developer Edition, or Release), whether it is activated by default or not, and the name of the preference you can use to activate or configure the feature. The description of each feature also includes links to relevant Bugzilla bugs that implement or enable the feature. This information allows you to try out experimental features and provide feedback before they are officially released.
1639607 - Enable <link rel=preload> on Nightly and Early Beta only by default
RESOLVED (honzab.moz) in Core - DOM: Networking. Last updated 2021-02-18.
2024: MDN HTTP content, GitHub, Firefox - Brian Smith
My open source work in 2024 on GitHub, some stats, visualizations, and a summary of the types of work I focused on.
Make your content pop with the Popover API and CSS Anchor Positioning
Building accessible menus, tooltips, and date pickers has never been this easy.
Detecting private mode in 2020
This is the update of my 2018 blog post on why firefox returns an all white …
How to try experimental CSS features | Chen Hui Jing
I love that browsers are now shipping new CSS features that may not necessarily have been fully baked yet behind feature flags. I can't actually pinpoint the…
Help us invent CSS Grid Level 3, aka “Masonry” layout
UPDATE October 2024: Since this article was published, members of the CSS Working Group have concluded that all of the grid abilities described here — variable-width tracks, explicit placement, spanning, and subgrids — are worth including in masonry layout, and are possible to implement performantly.
1930500 - Restore `Clear-Site-Data: cache` functionality
RESOLVED (manuel) in Toolkit - Data Sanitization. Last updated 2025-04-03.