cheatsheets/firefox.md

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---
title: Firefox
tags: [Archived]
archived: This sheet has not been updated with newer Firefox releases.
---
### [Firefox 31](https://www.mozilla.org/en-US/firefox/31.0/releasenotes/) (July 2014)
* CSS: variables
### [Firefox 30](https://developer.mozilla.org/en-US/Firefox/Releases/30) (June 2014)
* CSS: Allow `line-height` in `<input type='button'>`
* JS: `Console.count()`
* JS: ES6 array and generator comprehensions
### Firefox 29 (April 2014)
* New UI
* CSS: Unprefixed `box-shadow`
### Firefox 18 (Jan 2013)
* Faster JS compiler (IonMonkey)
* Mac retina support
* JS: `window.devicePixelRatio`
* JS: unprefixed `ontouchstart`
* HTML: `<input type='number'>`
* HTML: `<input type='color'>`
### Firefox 17 (Nov 2012)
* No more support for Mac OSX 10.5 and below
* SVG `FillPaint` and `StrokePaint`
* HTML `<iframe sandbox=...>` ([docs][iframe-sandbox])
* Official support for Windows 8 ([link][17reqs])
[iframe-sandbox]: https://developer.mozilla.org/en-US/docs/HTML/Element/iframe#attr-sandbox
[17reqs]: http://www.mozilla.org/en-US/firefox/17.0/system-requirements/
### Firefox 16 (Oct 2012)
* Web app support ([docs][webapp])
* Unprefixed CSS animations, transitions, transforms, gradients
[webapp]: https://developer.mozilla.org/en-US/docs/Apps/Getting_Started
### Firefox 15 (Aug 2012)
* Background updates
* SPDY v3
* Opus audio codec
* HTML `<audio played>` (and `<video>`)
* HTML `<source media=...>`
### Firefox 14 (Jul 2012)
* Full screen support for OSX Lion
* JS pointer lock API ([docs][lock])
* JS display sleep API ([docs][sleep])
[lock]: https://developer.mozilla.org/en-US/docs/API/Pointer_Lock_API
[sleep]: https://bugzilla.mozilla.org/show_bug.cgi?id=697132
### Firefox 13 (Jun 2012)
* Smooth scrolling by default
* SPDY on by default
* CSS `column-fill` ([docs][cf])
* ECMA 6 `Map` and `Set`
* CSS `background-position` extended syntax
* CSS `:invalid`
* CSS turn unit (`rotate(0.5turn)`)
[cf]: https://developer.mozilla.org/en/CSS/column-fill
### Firefox 12 (Apr 2012)
* CSS `text-align-last` ([docs][tal])
[tal]: https://developer.mozilla.org/en/CSS/text-align-last
### Firefox 11 (Mar 2012)
* `element.outerHTML` ([docs][outer])
* Dev tools: Style editor, 3D page inspector ([docs][tools])
* Unprefixed web sockets
* CSS `text-size-adjust` ([docs][tsa])
[outer]: https://developer.mozilla.org/en-US/docs/DOM/element.outerHTML
[tools]: https://hacks.mozilla.org/2011/12/new-developer-tools-in-firefox-11-aurora/
[tsa]: https://developer.mozilla.org/en-US/docs/CSS/text-size-adjust
### Firefox 10 (Jan 2012)
* CSS 3D transforms
* HTML `<bdi>` element
* JS fullscreen API ([docs][fs])
* IndexedDB APIs
* Dev tools: CSS Style inspector
[fs]: https://wiki.mozilla.org/Platform/Features/Full_Screen_APIs
### Firefox 9 (Dec 2011)
* Two-finger swipe in Mac OSX Lion
* CSS `font-stretch`
* CSS improved `text-overflow`
* JS `navigator.doNotTrack`
### Firefox 8 (Nov 2011)
### Firefox 7 (Sep 2011)
* CSS `text-overflow: ellipsis`
* Hidden `http://` prefix in address bar
### Firefox 6 (Aug 2011)
* JS `window.matchMedia`
* Websockets (!)
* JS EvetnSource / server-sent events
### Firefox 5 (Jun 2011)
* CSS animations
* Background tab `setTimeout` and `setInterval` clamped to 1000ms
### Firefox 4 (Mar 2011)
* Do Not Track (DNT) header
* New JS endinge (JagerMonkey)
* Hardware-accelerated rendering
* WebM video
* OpenType ligatures/kerning/font variants
* CSS transitions partial support
* JS audio data API
* JS `mozRequestAnimationFrame`
* HTML5 forms API
* `<video buffered>`
* HTML5 history API
* New HTML5 parser
* ...
### Firefox 3.6 (Jan 2010)
* CSS gradients
* CSS pointer events
* HTML drag & drop API
* HTML `<script async>`
### Reference
* [Firefox releases](https://www.mozilla.org/en-US/firefox/releases/)