Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual users alike.
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The Web, as it's meant to be experienced
Features
Faster than Safari. Firefox stays speedy when other browsers become sluggish.More private than Chrome.
Firefox respects your privacy by minimizing suggestive pop-ups.Bursting with features.
Tabbed browsing, developer tools, extensions — Firefox has it all, giving you the power to explore, customize, and create like never before.
New
New
Enhance IME support on Windows (Vista +) using TSF (Text Services Framework)Ability to set a profile picture for your Firefox AccountFirefox Hello now includes instant messagingSVG images can be used as faviconsImproved box-shadow rendering performance
Changed
WebRTC now requires perfect forward secrecyWARP is disabled on Windows 7Updates to image decoding processSupport for running animations of 'transform' and 'opacity' on the compositor thread
HTML5
MessageChannel and MessagePort API enabled by defaultAdded support for the transform-origin property on SVG elementsCSS Font Loading API enabled by defaultNavigator.onLine now varies with actual internet connectivity (Windows and Mac OS X only)Copy/Cut Web content from JavaScript to the OS clipboard with document.execCommand(“cut”/”copy”)Implemented Cache API for querying named caches that are accessible Window, Worker, and ServiceWorker
Developer
Removed support for binary XPCOM components in extensions, use addon SDK “system/child_process” pipe mechanism for native binaries insteadNetwork requests can be exported in HAR formatQuickly add new CSS rule with New Rule button in the InspectorScreenshot a node or element from markup view with the Screenshot Node context menu itemCopy element CSS rule declarations with the Copy Rule Declaration context menu item in the InspectorPseudo-Class panel in the Inspector
Fixed
Picture element does not react to resize/viewport changesVarious security fixes:Information disclosure via the High Resolution Time API2015-113 Memory safety errors in libGLES in the ANGLE graphics library2015-112 Vulnerabilities found through code inspection2015-111 Errors in the handling of CORS preflight request headers2015-110 Dragging and dropping images exposes final URL after redirects2015-109 JavaScript immutable property enforcement can be bypassed2015-108 Scripted proxies can access inner window2015-107 Out-of-bounds read during 2D canvas display on Linux 16-bit color depth systems2015-106 Use-after-free while manipulating HTML media content2015-105 Buffer overflow while decoding WebM video2015-104 Use-after-free with shared workers and IndexedDB2015-103 URL spoofing in reader mode2015-102 Crash when using debugger with SavedStacks in JavaScript2015-101 Buffer overflow in libvpx while parsing vp9 format video2015-100 Arbitrary file manipulation by local user through Mozilla updater2015-99 Site attribute spoofing on Android by pasting URL with unknown scheme2015-98 Out of bounds read in QCMS library with ICC V4 profile attributes2015-97 Memory leak in mozTCPSocket to servers2015-96 Miscellaneous memory safety hazards (rv:41.0 / rv:38.3)