Firefox for Mac
Old Version of Firefox 20 (Beta 5)
Selected Version
Firefox 20 (Beta 5)
Supported Systems
Legacy OS support
Mac OS X 10.1 (Firefox 1.0.8), OS X 10.2 and OS X 10.3 (Firefox, Mac OS X 10.4 (Firefox 3.X), Mac OS X 10.5 or above (Current Version)
Open Source
Release Date
15 March, 2013 (8 years ago )

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Download Firefox 20 (Beta 5)
Firefox 20 (Beta 5)

Firefox 20 (Beta 5) (38.92 MB)

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System Requirements of Firefox 20 (Beta 5)
  • Mac OS X 10.5 Leopard (Intel)
  • Mac OS X 10.6 (Snow Leopard) (Intel)
  • Mac OS X 10.7 (Lion) (Intel)
  • Mac OS X 10.8 (Mountain Lion) (Intel)
Program Information of Firefox 20 (Beta 5)
Version Name:
Firefox 20 (Beta 5)

File Size:
38.92 MB

Released Date:
15 March, 2013 (8 years ago)

MD5 Checksum:

SHA1 Checksum:

Version History of Firefox 20 (Beta 5)
  • NEW - Per-window Private Browsing
  • NEW - New download experience
  • NEW - Ability to close hanging plugins, without the browser hanging
  • NEW - Firefox will offer to reset the Awesomebar search provider, if it has been changed…

View More...

Firefox for Mac Screenshots

Screenshots are not available for this software

About Firefox for Mac

Mozilla Firefox is a graphical web browser developed by the Mozilla Corporation and a large community of external contributors. Firefox started as a fork of the Navigator browser component of the Mozilla Application Suite. Firefox has replaced the Mozilla Suite as the flagship product of the Mozilla project, under the direction of the Mozilla Foundation.

To display web pages, Firefox uses the Gecko layout engine, which implements most current web standards in addition to several features which are intended to anticipate likely additions to the standards. Latest Firefox features include tabbed browsing, spell checking, incremental find, live bookmarking, a download manager, private browsing, location-aware browsing (also known as "geolocation") based exclusively on a Google service and an integrated search system that uses Google by default in most localizations. Functions can be added through add-ons, created by third-party developers, of which there is a wide selection, a feature that has attracted many of Firefox's users. Mozilla Firefox is a cross-platform browser, providing support for various versions of Microsoft Windows, Mac OS X, and Linux.

Firefox Features

  • Improved Tabbed Browsing
  • Spell Checking
  • Search Suggestions
  • Session Restore
  • Web Feeds (RSS)
  • Live Titles
  • Pop-up Blocker

Updates : Firefox for Mac Updates