Mozilla Firefox Portable Edition 21.0

4.3 out of 5 stars 4.3 (665 votes)

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Windows 7/Vista/XP / Freeware / 66,983 downloads

Mozilla Firefox Portable Edition is a fully functional package of Firefox optimized for use on a USB key drive. It has some specially-selected optimizations to make it perform faster and extend the life of your USB key as well as a specialized launcher that will allow most of your favorite extensions to work as you switch computers. It will also work from a CDRW drive (in packet mode), ZIP drives, external hard drives, some MP3 players, flash RAM cards and more.

Reviews of Mozilla Firefox Portable Edition

  1. 5 out of 5 stars
    Sven123456789

    Reviewing 21.0 (May 14, 2013)

    Don't think many pc users know about portable Firefox, or any portable software by asking around. In anycase. This is def. software I can't live without. A version of Firefox that you can install on your flash drive and use on any pc. Also a good way to try the latest version without installing if fully on ur pc. So you can get an idea if you like it or not. Takes a bit of fooling around to inport your desktop firefox settings, but its well worth it..

  2. 4 out of 5 stars
    Andem

    Reviewing 18.0 (Jan 10, 2013)

    Firefox used to be a great browser, but memory leak issues have never been resolved. The new rapid-release version numbers make me dizzy.

    Thanks for providing a portable version, though. Firefox is still my favourite browser!

  3. 1 out of 5 stars
    FatBastard

    Reviewing 17.0 (Nov 21, 2012)

    I like Firefox but this version (17) enables Cleartype by default and that's HORRIBLE! !!

    The only way I know to disable Cleartype in Firefox 17 is to disable hardware acceleration in the advanced settings.

    If it wasn't for all this my rating would be 3/5

  4. 4 out of 5 stars
    HeilNizar

    Reviewing 10.0.2 (Feb 19, 2012)

    Any chance you will stop writing to AppData? I know its an empty folder for crash report etc, but I don't care, it makes me worry at night.

  5. 4 out of 5 stars
    cricri_pingouin

    Reviewing 7.0.1 (Oct 3, 2011)

    No major complaints from me except that the escalating version numbers have been deprecating perfectly fine addons real quick, argh. I used to crank up "maxversion" a notch in "install.rdf", but still annoying, so I took a chance and set them to "99.*" and I'll see how it goes in the next few years!

    Also, as Blaxima rightfully pointed out, it can leave some leftovers behind, especially if an error log is created.

    Otherwise, works fine: not worse then Opera/IE/Chrome, and the addons make it a more flexible choice for me. I downloaded Chrome Portable again but didn't get a chance to give it another go yet.

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