Mozilla FirefoxOverview

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.

The Web, as it's meant to be experienced


  • 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.



  • Enhance IME support on Windows (Vista +) using TSF (Text Services Framework)
  • Ability to set a profile picture for your Firefox Account
  • Firefox Hello now includes instant messaging
  • SVG images can be used as favicons
  • Improved box-shadow rendering performance


  • WebRTC now requires perfect forward secrecy
  • WARP is disabled on Windows 7
  • Updates to image decoding process
  • Support for running animations of 'transform' and 'opacity' on the compositor thread


  • MessageChannel and MessagePort API enabled by default
  • Added support for the transform-origin property on SVG elements
  • CSS Font Loading API enabled by default
  • Navigator.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


  • Removed support for binary XPCOM components in extensions, use addon SDK "system/child_process" pipe mechanism for native binaries instead
  • Network requests can be exported in HAR format
  • Quickly add new CSS rule with New Rule button in the Inspector
  • Screenshot a node or element from markup view with the Screenshot Node context menu item
  • Copy element CSS rule declarations with the Copy Rule Declaration context menu item in the Inspector
  • Pseudo-Class panel in the Inspector


  • Picture element does not react to resize/viewport changes
  • Various security fixes:
    • Information disclosure via the High Resolution Time API
    • 2015-113 Memory safety errors in libGLES in the ANGLE graphics library
    • 2015-112 Vulnerabilities found through code inspection
    • 2015-111 Errors in the handling of CORS preflight request headers
    • 2015-110 Dragging and dropping images exposes final URL after redirects
    • 2015-109 JavaScript immutable property enforcement can be bypassed
    • 2015-108 Scripted proxies can access inner window
    • 2015-107 Out-of-bounds read during 2D canvas display on Linux 16-bit color depth systems
    • 2015-106 Use-after-free while manipulating HTML media content
    • 2015-105 Buffer overflow while decoding WebM video
    • 2015-104 Use-after-free with shared workers and IndexedDB
    • 2015-103 URL spoofing in reader mode
    • 2015-102 Crash when using debugger with SavedStacks in JavaScript
    • 2015-101 Buffer overflow in libvpx while parsing vp9 format video
    • 2015-100 Arbitrary file manipulation by local user through Mozilla updater
    • 2015-99 Site attribute spoofing on Android by pasting URL with unknown scheme
    • 2015-98 Out of bounds read in QCMS library with ICC V4 profile attributes
    • 2015-97 Memory leak in mozTCPSocket to servers
    • 2015-96 Miscellaneous memory safety hazards (rv:41.0 / rv:38.3)

Mozilla FirefoxTech Specs

File Size
78.9 MB
Operating Systems
Mac OS X
System Requirements
  • OS X 10.6 or later

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