Mozilla Firefox®, Portable Edition is the popular Mozilla Firefox web browser bundled with a PortableApps.com Launcher as a portable app, so you can take your bookmarks, extensions and saved passwords with you. Mozilla Firefox Portable Edition can be copied to a thumb drive so that you can use it where ever you go. Mozilla Firefox®, Portable Edition does not register itself with the system, and thus cannot be set as the default browser using the GUI.
DefaultBrowser, an utility which I wrote allows you set the default web browser for your user profile in Windows XP, without affecting other users in the system. DefaultBrowser v1.7 (and higher) supports Mozilla Firefox®, Portable Edition. Here is how to set Mozilla Firefox®, Portable Edition as the default browser for your user profile in Windows XP.
Visit the DefaultBrowser page, download the application and save the file to Desktop. Unzip the file and extract the contents to a folder of your choice say D:\Software\Browsers.
Select Firefox Portable from the list of browsers, and click Apply.

In the Browse dialog box, select the location where the executable FirefoxPortable.exe is located.

Mozilla Firefox®, Portable Edition is now set as the default browser for your user account.
Important: If you’re using Mozilla Firefox Portable Edition from a USB disk, whenever the drive-letter for the USB disk changes, you’ll need to re-register FirefoxPortable.exe using the DefaultBrowser utility again. For instance, the drive-letter for your USB disk may change when adding additional hardware in your system.
Related Posts
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- Restore Missing “Mozilla Firefox” Entry to Set Program Access and Defaults in Windows XP
- Open in RegEdit Add-on for Mozilla Firefox
- Fix for Windows Error Opening Internet Shortcut or Local HTML File Using Firefox
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.mht files does not open with Firefox Portable?
and i found ,i run regedit ,edit like this
[HKEY_CLASSES_ROOT\.mht]
@=”MyHTMLfile”
and then ,is ok…
now i can open .mht files with firefox portable.
i wish you can update your soft.
Windows 7 32/64 support would be nice, unfortunately leaving feedback on the developers site returns 404.
Hello everyone,
what about PortableThunderbird? Any plans?
Best regards!
The ‘Default Browser’ site is down, or the page no longer exists.
Is it available for d/load anywhere else?
wow awesome! thanks developer dude!