Mozilla Firefox, Portable Edition Stable 105.0 (web browser) Released

John T. Haller's picture
Submitted by John T. Haller on September 20, 2022 - 2:50pm is proud to announce the release of Mozilla Firefox®, Portable Edition 105.0. It's the Mozilla Firefox browser bundled with a launcher as a portable app, so you can take your browser, bookmarks, settings and extensions on the go. And it's open source and completely free. Firefox Portable is a dual-mode 32-bit and 64-bit app, ensuring Firefox runs as fast as possible on every PC.

Mozilla®, Firefox® and the Firefox logo are registered trademarks of the Mozilla Foundation and used under license.

Update automatically or install from the portable app store in the Platform.


FirefoxPortable_small-Quantum.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... 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 Platform 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 other localized releases from the Localizations section of the page. Get it today!

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Digiu's picture

Hi John,

I received the following error during an auto-update. I chose not to run Firefox in the unsupported state, and then was redirected to the to manually download and install Firefox. Does this sound normal to you?

"Integrity Failure Warning: Mozilla Firefox, Portable Edition was installed or upgraded without using its installer and some critical files have been modified. This could cause data loss, personal data left behind on a shared PC, functionality issues, and/or may be a violation of the application's license. Neither the application publisher nor will be responsible for any issues you encounter.

Would you like to start Mozilla Firefox, Portable Edition in its current usupported state?

I really wish ISP's would secure their networks, so a person could have some assurance their internet traffic isn't being manipulated by a third party

Is there any chance you could enable attachments or the ability to paste screen captures into a post? Posting questions by typing out screen errors is time-consuming.

Thank you for your time & consideration.

John T. Haller's picture

How did you do the update? That error can happen if your device has an issue with write access to a file. Pro tip: You can CTRL-C on a messagebox to copy the text out. You can post screenshots to a service like IMGUR and link from here. We will likely never allow attachments to comments.

Sometimes, the impossible can become possible, if you're awesome!