Firefox Historical Release Features Cheatsheet (Archive)

Firefox is an open-source web browser developed by Mozilla.

Archived note: This document is an archive of web platform features introduced in early Firefox releases (Firefox 3.6 through 31).

Firefox 31 (July 2014)

• CSS: Variables (var(--name))

Firefox 30 (June 2014)

• CSS: Allowed line-height on <input type='button'>
• JS: console.count()
• JS: ES6 Array comprehensions and Generator comprehensions

Firefox 29 (April 2014)

• Australis user interface redesign
• CSS: Unprefixed box-shadow

Firefox 18 (January 2013)

• Faster JavaScript compiler (IonMonkey)
• Mac Retina display support
• JS: window.devicePixelRatio
• JS: Unprefixed ontouchstart
• HTML: <input type='number'>
• HTML: <input type='color'>

Firefox 17 (November 2012)

• Mac OS X 10.5 and lower no longer supported
• SVG FillPaint and StrokePaint
• HTML <iframe sandbox=...> (Docs)
• Official Windows 8 support (Requirements)

Firefox 16 (October 2012)

• Web apps support (Docs)
• Unprefixed CSS animations, transitions, transforms, and gradients

Firefox 15 (August 2012)

• Silent background updates
• SPDY v3 protocol
• Opus audio codec
• HTML <audio played> and <video> attributes
• HTML <source media=...>

Firefox 14 (July 2012)

• OS X Lion fullscreen support
• JS Pointer Lock API (Docs)
• JS Display Sleep API (Docs)

Firefox 13 (June 2012)

• Smooth scrolling on by default
• SPDY protocol enabled by default
• CSS column-fill (Docs)
• ECMAScript 6 Map and Set
• CSS extended background-position syntax
• CSS :invalid pseudo-class
• CSS turn units (rotate(0.5turn))

Firefox 12 (April 2012)

• CSS text-align-last (Docs)

Firefox 11 (March 2012)

• element.outerHTML (Docs)
• Developer tools: Style Editor, 3D Page Inspector (Docs)
• Unprefixed WebSockets
• CSS text-size-adjust (Docs)

Firefox 10 (January 2012)

• CSS 3D transforms
• HTML <bdi> element
• JS Fullscreen API (Docs)
• IndexedDB API
• Developer tools: CSS Page Inspector

Firefox 9 (December 2011)

• Mac OS X Lion two-finger swipe gesture
• CSS font-stretch
• Improved CSS text-overflow
• JS navigator.doNotTrack

Firefox 8 (November 2011)

• Cross-origin WebGL textures security restrictions
• HTML5 context menus

Firefox 7 (September 2011)

• CSS text-overflow: ellipsis
• Hidden http:// prefix in URL address bar
• Instant synchronization for bookmarks and passwords

Firefox 6 (August 2011)

• JS window.matchMedia
• WebSockets standard protocol support
• JS EventSource / Server-Sent Events

Firefox 5 (June 2011)

• CSS animations
• Background tabs setTimeout and setInterval clamped to 1000ms

Firefox 4 (March 2011)

• Do Not Track (DNT) header
• JägerMonkey JavaScript engine
• Hardware accelerated graphics rendering
• WebM video support
• OpenType ligatures, kerning, and font variants
• CSS transitions (partial)
• JS Audio Data API
• JS mozRequestAnimationFrame
• HTML5 forms validation API
• <video buffered>
• HTML5 History API
• New HTML5 parser

Firefox 3.6 (January 2010)

• CSS gradients
• CSS pointer-events
• HTML Drag and Drop API
• HTML <script async>

References

• Firefox Release Notes