Mozilla Firefox, Portable Edition 3.5.1 Released

John T. Haller's picture
Submitted by John T. Haller on July 17, 2009 - 1:12pm

Firefox is proud to announce the release of Mozilla Firefox®, Portable Edition 3.5.1. 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. This new release updates Firefox to 3.5.1. We've also expanded the languages available to include Chinese (Simplified and Traditional), Dutch, English, French, German, Hungarian, Italian, Japanese, Polish, Portuguese (Portugal and Brazil), Russian and Spanish (Spain and International). It's packaged in Format so it can easily integrate with the Suite. And, as always, it's open source and completely free.

Read on for more details...

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portable_firefox_small.pngMozilla Firefox is a fast, full-featured web browser that's easy to use. It has lots of great features including popup-blocking, tabbed-browsing, integrated search, improved privacy features, automatic updating and more. Plus, thanks to the launcher bundled in the Mozilla Firefox, Portable Edition, it leaves no personal information behind on the machine you run it on, so you can take your favorite browser along with all your favorite bookmarks and extensions with you wherever you go. Learn more about Mozilla Firefox...

New In Firefox 3.5

Firefox 3.5 makes surfing the Web easier and more enjoyable with exciting new features and platform updates that allow Web developers to create the next generation of Web content. Native support for open video and audio, private browsing, and support for the newest Web technologies will enable richer, more interactive online experiences.

Performance. Firefox 3.5 includes the powerful new TraceMonkey JavaScript engine, which delivers unprecedented performance with today’s complex Web applications. Firefox 3.5 is more than two times faster than Firefox 3 and ten times faster than Firefox 2.

Open Video and Audio. Enjoy video and audio content from within your browser, without the need for plugins. Video is a vital part of the modern Web, whether it’s used to communicate, educate, or entertain. Firefox 3.5 delivers the first native integration of audio and video directly into the browser. Now everyone can easily watch open format Ogg Theora videos.

Web developers can use these technologies to design pages that interact with video content in new and exciting ways, offering richer interactive experiences beyond controlling playback and volume.

Privacy Controls. Firefox 3.5 includes features designed to protect your privacy online and provide greater control over your personal data.

While using the new Private Browsing mode in Firefox 3.5, nothing you encounter on the Web will be stored from that moment on during your browsing session. Unique to Firefox 3.5, the new Forget this Site feature can remove every trace of a site from your browser. If you want to remove all private data or activity from the past few hours, Clear Recent History, another Firefox-only feature, gives you full control over what stays and what goes.

Location Aware Browsing. Location Aware Browsing saves you time by allowing websites to ask you where you are located. If you choose to share your location with a website, it can use that information to find nearby points of interest and return additional, useful data like maps of your area. It’s all optional – Firefox doesn’t share your location without your permission.

New in This Release

In this release, Firefox has been updated to 3.5.1 (release notes).

Auto-Update Issue

If you allow Mozilla Firefox, Portable Edition to auto-update, some non-personal files may remain on the local PC. This will be addressed in a later release. Installer / Format

Mozilla Firefox, Portable Edition is packaged in a Installer so it will automatically detect an existing installation when your drive is plugged in. And it's in Format, so it automatically works with the Suite including the Menu and Backup Utility.


Mozilla Firefox, Portable Edition is available for immediate download from the Mozilla Firefox, Portable Edition homepage. You can get the German release from the German homepage and the other localized releases from the Localization page. Get it today!

Story Topic:


It seems to run slower compared to 3.5 on my flash drive.

Hey! Where'd it go?

My favorite browser is hanging om me for the fist time ever!
Such a disappointment. I skipped 3.5.0 wait for the first update.
Day one was OK but now on day two every click I do the browser is consuming one CPU at 100% for +- 1min at a click.
Hope 5.3.2 is out soon. Back to 3.0.11 :).

But on the bright side " Long live PA"
Thanks John.

... like watermen, row in one direction and look in another

but in my case, after installing it on my desktop, side by side with my Fx 3.0.11, Fx 3.5 seems to load homepage faster than usual, but lags behind when opening other social sites-compared to my previous precious 3.0.11.. Sites with flash is running slower and sites with java is much much slower. i didn't think it was from my pc software's problem, because I've already viewed that site using my older Fx. Is it only me, or 3.5 is having quite a 'shocking' fast performance?

It says (translated to English):
Another copy of $APPNAME is already running.

$APPNAME must be automatically changed to name of my browser, but program just outputs a variable name.