Firefox 154 release notes for developers
sibling-index(), text-box-trim, four new Iterator methods, and unprefixed line-clamp behind a flag.
Firefox news
Firefox 153 release notes for developers
Intl.Locale info methods, IndexedDB getAllRecords(), source phase imports, and WebAssembly JSPI.
Context-aware headings in HTML
How headingoffset shifts heading levels in the accessibility tree without changing tags.
Firefox 152 release notes for developers
field-sizingfor form controls, Notification actions, and pointer lockunadjustedMovement.
Firefox 151 release notes for developers
@containerstyle()queries, Document Picture-in-Picture, desktop Web Serial, andkeyboardLock.
Browsers treat big sites differently
How Safari and Firefox quietly patch the web to keep big sites working.
Firefox 150 release notes for developers
New CSS features, media pseudo-classes, animation range, and ariaNotify().
Firefox 149 release notes for developers
Popover hint,
CloseWatcher,shape-outside: xywh(), and more CSS and API updates.
Making WebAssembly a first-class language on the web
Component model could remove JS glue, simplify loading, and speed up web API access.
Firefox 148 release notes for developers
HTML sanitizer, Trusted Types, CSS
shape(), and more.
Firefox 147 release notes for developers
CSS anchor positioning, Navigation API, WebGPU on Apple Silicon, and DevTools improvements.
Firefox 146 release notes for developers
CSS and MathML improvements plus new APIs and Navigation API preview.