Firefox
Old Version of Firefox 21.0 (Beta 1)
Selected Version
Firefox 21.0 (Beta 1)
Supported Systems
Legacy OS support
Windows 95, 98, Me (Firefox 2), 2000, XP, Vista, 7, 8
License
Open Source
Release Date
02 April, 2013 (2 years ago )

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Download Firefox 21.0 (Beta 1)
Firefox 21.0 (Beta 1)

Firefox 21.0 (Beta 1) (20.86 MB)

okay 45 scans reported this version clean

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System Requirements of Firefox 21.0 (Beta 1)
  • Windows XP
  • Windows XP x64
  • Windows Vista
  • Windows Vista x64
  • Windows 7
  • Windows 7 x64
  • Windows Server 2003
  • Windows Server 2008
  • Windows Server 2003 x64
  • Windows 8
  • Windows 8 x64
  • Windows Server 2012
Program Information of Firefox 21.0 (Beta 1)
Version Name:
Firefox 21.0 (Beta 1)

File Size:
20.86 MB

Released Date:
02 April, 2013 (2 years ago)

MD5 Checksum:
364EE3E63C8F506000BBA45DE6FBE1C1

SHA1 Checksum:
2F99683CC2D8CF3CED3E8C53ABA4B9427324ECC3

Version History of Firefox 21.0 (Beta 1)
  • NEW - Enhanced three-state UI for Do Not Track (DNT)
  • NEW - Firefox will suggest how to improve your application startup time if needed
  • NEW - Preliminary implementation of Firefox Health Report (see FAQ)
  • CHANGED - Ability…

View More...

Firefox Screenshots
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Firefox 13.0 (Beta 3) is a fast, flexible and secure web browser with a mission: to build a better internet and make web browsing better for you. More
About Firefox

Mozilla Firefox is a free, open source, cross-platform, graphical web browser developed by the Mozilla Corporation and hundreds of volunteers. The browser began as a fork of the Navigator component of the Mozilla Application Suite; Firefox has since become the foundation's main development focus (along with its Thunderbird mail and news client), and has replaced the Mozilla Suite as their official main software release.
Firefox includes tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and an integrated search system that uses the user's desired search engine. Functions can be added through add-ons created by third-party developers, the most popular of which include the NoScript JavaScript disabling utility, Tab Mix Plus customizer, FoxyTunes media player control toolbar, Adblock Plus ad blocking utility, StumbleUpon (website discovery), Foxmarks Bookmark Synchronizer (bookmark synchronizer), DownThemAll! download enhancer, and Web Developer toolbar.

Firefox Features:

  • Remember site passwords without ever seeing a pop-up.
  • Bookmark, search and organize Web sites quickly and easily.
  • View Web pages faster, using less of your computer's memory.
  • Find the sites you love in seconds - enter a term for instant matches that make sense.
  • Avoid online scams, unsafe transactions and forgeries with simple site identity.
  • See any part of a Web page, up close and readable, in seconds.
  • Browse with a Firefox that's integrated into your computer's operating system.

Updates : Firefox Updates

Did You Know?

Firefox raises the bar for security. The new malware and phishing protection helps protect from viruses, worms, trojans and spyware to keep people safe on the Web.