Firefox Version 3.5 Free Download

28,717 downloadsUpdated: August 24, 2015MPL (Mozilla Public License) is proud to announce the release of Mozilla Firefox®, Portable Edition 3.5.3 in 15 languages. It's the latest Mozilla Firefox browser bundled with a launcher as a portable app, so you can take your browser, bookmarks, settings and extensions on the go. The runtime includes everything you need to run existing apps/programs built with.NET Framework. Download.NET Framework 3.5 SP1 Runtime. If you're using Windows 10, Windows Server 2016, or Windows Server 2019, we recommend installing.NET Framework 3.5 through the control panel. Released Apr 21, 2020 - 2.46 MB. Works with firefox 57.0 and later. Added support of First Party isolation (FPI). AVD can now download videos when FPI is on, as well as using the Tor browser. Scoring system updates: detection of segments and previews suppressed, fixed video downloads. Firefox 3.5 Release Notes. V.3.5.1, released July 16th, 2009 Check out what's new, the known issues and frequently asked questions about the latest version of Firefox. As always, you're encouraged to tell us what you think, either using this feedback form or by filing a bug in Bugzilla.

A free, cross-platform version of the powerful Mozilla Firefox web browser designed for developers

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What's new in Mozilla Firefox Developer Edition 42.0 Alpha 2:

  • Improved private browsing windows block some web page elements that could track your web behavior across sites
  • GTK3 integration (GNU/Linux only)
  • Hardware acceleration for 2D canvas content (Mac OS X only)
  • Indicator added to tabs that play audio with one-click muting (Adobe Flash supported since version 19)
Read the full changelog Mozilla firefox version 3.5 free download

Customers running older versions of Firefox can now update to Firefox 3.6.16 or Firefox 3.5.18, while they also have the option of upgrading to Firefox 4.0 Final. Of course, it’s easy to guess.

Mozilla Firefox Developer Edition is a free, multiplatform and open source version of the award-winning and highly acclaimed Mozilla Firefox web browser, specifically designed for web developers who want the best tools to create modern and powerful websites.

It includes a wide range of tools for web development, including Page Inspector, Web Console, JavaScript Debugger, Network Monitor, Web Audio Editor, Style Editor, and IDE (Integrated Development Environment).

Features at a glance


In addition to the standard features that are present in the main Mozilla Firefox edition, this flavor introduces an extra button on the main toolbar, allowing web developers to quickly access various tools that help them build a better Web.

Another button will let web developers easily develop, deploy and debug applications for Mozilla’s Firefox OS mobile operating system directly in the web browser or on a device powered by Firefox OS. This feature is called WebIDE.

The Sync function just got revamped in the Developer Edition of Mozilla Firefox, allowing users to keep all of their data (bookmarks, passwords, open tabs) in sync across desktop and mobile browsers.

Being based on an upcoming version of the Mozilla Firefox web browser, the Developer Edition also introduces the revamped Preferences (about:preferences) panel, which opens in a new tab, giving users quicker access to general settings, content settings, applications settings, privacy settings, security settings, sync and other advanced settings.

Firefox Version 3.5 Free Download

Availability and supported operating systems

Just like current versions of the Mozilla Firefox web browser, the Developer Edition is distributed for free as pre-built binary packages, supporting all GNU/Linux distributions and running on both 32-bit (i386) and 64-bit (x86_64) computers.

Firefox Version 3.5 Free Download

In addition to Linux, the Mozilla Firefox Developer Edition web browser is also officially supported on the Microsoft Windows and Mac OS X operating systems. Be aware though, that it is in early development and bugs are present.

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Mozilla Firefox Developer Edition was reviewed by Marius Nestor
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Mozilla Firefox Developer Edition 42.0 Alpha 2

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Welcome to the Project on SourceForge. Most of our users download and install our apps through the Platform's built-in app store and then keep them updated using the platform's built in updater. You can download the Platform and give it a try using the recommended download at the top of the page.

You can also use our apps on their own just by downloading the individual .paf.exe portable installers. Portable installers in Format have a ton of benefits over generic zip files including smaller download size, digitally signed, self-checks for tampering, and lots more. You can find all our apps in the Portable App Directory or by browsing individual app downloads above.

If you need any help, you can visit the Support pages or visit our online forums.

Mozilla Firefox Version 3.5 Free Download

All of the above resources are available on

Firefox Version 3

Happy Portable App-ing!