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Portable Firefox is the popular Mozilla Firefox Web browser packaged so you can carry around with you on any portable device, USB thumb drive, iPod, portable hard drive, memory card, other portable device (also on your internal hard disk) as long as it has 75 MB of free space and use on any Mac OS X computer, taking your bookmarks, extensions, history, cookies, and saved passwords with you.

  • Drag the "Portable Firefox OS X" folder to your portable device, USB thumb drive, iPod, portable hard drive, memory card, other portable device (also to your internal hard disk) as long as it has 75 MB of free space.
  • Clicking more...

What's New

Version 4.0.1r4.1:
  • Firefox updated to 4.0.1
  • English, French, German, Italian and Japanese languages available.


  • Mac OS X 10.5 or later

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Portable Firefox User Discussion

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daluu Member IconReview+0

When I last checked, version was 3.6. Is v3.6 still available?

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Version 4.0.1 r4.1
Orca1 Member IconReview+0

I do not understand why this portable version, written specifically as 4.0.1 r4.1 should start pestering me for an update to 11.0 as soon as I ran it from my thumb drive. Should I let it update to 11.0? What will that do to my security?

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Version 4.0.1 r4.1
Hey Billy!!! Member IconComment+26
Hey Billy!!!

Does this work on an iPhone?

Reply1 reply
Version 3.6 r4.1

Ummm...think about it for a second...does Firefox currently run on the iPhone? No. So how would a portable version run either?

Ronin_1 Member IconComment+34

I installed Portable Firefox 3 rc4 on a USB hard drive that had been formatted on a Mac (OS 10.5.3) which had previously run Portable Firefox 2.x. When I went to launch it there was a white circle/slash over the Firefox icon and when double clicked it says something to the effect that it does not support this architecture (the Mac is a G4). Bummer, it does not work.

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Version 3.0r4.0
sjj_public Member IconComment+6

This is based on the similar Hybrid portable firefox that supports both Mac and Windows. There is good reason to make the Mac part better, but why remove the Windows support? It is very useful to be able to use Firefox on someone elses Windows PC if that is all that's available to you. Just not sure I understand why this is a separate, Mac Firefox-only version. Perhaps the author should just contribute their Mac-specific improvements to the original?

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jps Member IconComment+0

To the developer: I've been trying to fix a strange behavior in Firefox on my Mac since I downloaded your app. Here's the link to the discussion on the Firefox forum:


If you can't open the link, you can email me at jps200@gmail.com

It's possible there may be a bug in your program.


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Version 1.5r2.0
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> 3 2


Current Version (4.x)


Downloads 49,512
Version Downloads 16,401
License Free
Date 22 May 2011
Platform OS X / Intel 32
Price Free