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Download Firefox 31.0 Beta 1

Firefox 31.0 Beta 1

By Mozilla Organization  (Open Source)
User Rating

Managing Browser Add-Ons In Mozilla Firefox

Mozilla Firefox is a fast, light and tidy open source web browser. At its public launch in 2004 Mozilla Firefox was the first browser to challenge Microsoft Internet Explorer’s dominance. Since then, Mozilla Firefox has consistently featured in the top 3 most popular browsers globally. The key features that have made Mozilla Firefox so popular are the simple and effective UI, browser speed and strong security capabilities. The browser is particularly popular with developers thanks to its open source development and active community of advanced users.

Easier Browsing

Mozilla put of a lot of resources into creating a simple but effective UI aimed at making browsing quicker and easier. They created the tab structure that has been adopted by most other browsers. In recent years Mozilla has also focused on maximizing browsing area by simplifying toolbar controls to just a Firefox button (which contains settings and options) and back/forward buttons. The URL box features direct Google searching as well as an auto predict/history feature called Awesome Bar. On the right side of the URL box there are bookmarking, history and refresh buttons. To the right of the URL box is a search box which allows you to customize your search engine options. Outside of that a view button controls what you see below the URL. Next to that you have the download history and home buttons.


Mozilla Firefox boasts impressive page load speeds thanks to the excellent JagerMonkey JavaScript engine. Start up speed and graphics rendering are also among the quickest in the market. Firefox manages complex video and web content using layer-based Direct2D and Driect3D graphics systems. Crash protection ensures only the plugin causing the issue stops working, not the rest of the content being browsed. Reloading the page restarts any affected plugins. The tab system and Awesome Bar have been streamlined to launch/get results very quickly too.


Firefox was the first browser to introduce a private browsing feature which allows you to use the internet more anonymously and securely. History, searches, passwords, downloads, cookies and cached content are all removed on shutdown. Minimizing the chances of another user stealing your identity or finding confidential information. Content security, anti-phishing technology and antivirus/antimalware integration ensures your browsing experience is as safe as possible.

Personalisation & Development

One of the best features of the Firefox UI is customization. Simply right click on the navigation toolbar to customize individual components or just drag and drop items you want to move around. The inbuilt Firefox Add-ons Manager allows you to discover and install add-ons within the browser as well as view ratings, recommendations and descriptions. Read more about the top recommended add-ons for Mozilla Firefox. Thousands of customizable themes allow you to customize the look and feel of your browser. Site authors and developers can create advanced content and applications using Mozilla’s open source platform and enhanced API.

Looking for the Mac version of Firefox? Download Here

Looking for the 64-bit version of Firefox? Download Here

Check out our guide to alternative browsers if you're looking for something a little different.

Please note: from version 53.0 onward Windows XP and Vista are no longer supported.

Title: Firefox 31.0 Beta 1
Filename: Firefox Setup 31.0b1.exe
File size: 30.68MB (32,174,824 bytes)
Requirements: Windows 2000 / XP / Vista / Windows 7 / XP 64-bit / Vista 64-bit / Windows 7 64-bit / Windows 8 / Windows 8 64-bit / Windows 10 / Windows 10 64-bit
Languages: Multiple languages
License: Open Source
Date added: June 12, 2014
Author: Mozilla Organization
MD5 Checksum: 343CA99406B7E7EB62AA6F276CE45609

Bug 996143 - remove hsb from shipped-locales.
Bug 996143 - fix mozconfig whitelists for 31.0b1.
Bug 1023108 - nsITabSource.idl UUID have to be updated for the 31 release.
Bug 1023109 - Update nsIXPCScriptable.idl UUID.
Bug 1023119 - Update nsIGfxInfo's uuid
Bug 1021443 - java.lang.IllegalStateException: Already registered Webapps:Postinstall under a different type.
Bug 1004530 - Part 1: (Subset for uplift) Subset of part 1 that ensures that the check timer is running when new pairs are created.
Bug 1021123 - Improve colors in remote tabs pull-to-refresh.
Bug 891840 - Disable test_pixel_lengths.html on all platforms for intermittent crashes.
Bug 947531 - Skip satchel tests on Linux due to frequent intermittent timeouts.
Bug 1021335 - Fix DataChannel leak of recv buffers from SCTP.
Bug 894922 - Disable test_bug448534.html on Windows for intermittent failures.

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