1. Mozilla Firefox Portable Old Version
2. Mozilla Firefox Portable Version
3. Mozilla Firefox Portable Edition Download

Users on 64-bit Windows who download Firefox can get our 64-bit version by default. That means you get a more secure version of Firefox, one that also crashes a whole lot less. How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more.

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Firefox makes it to version 54, Mozilla dubs it 'the best Firefox' Mozilla has announced the latest update to its popular web browser. Firefox is now up to version number 54 with changes that, according to the company, make it 'the best Firefox in history' thanks to an important performance tweak in the form of multiprocess support when loading tabs.

What’s the difference between 32-bit and 64-bit?

Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. Also, with the jump from 32 to 64 bits, a security feature called Address Space Layout Randomization (ASLR) works better to protect you from attackers. Linux and macOS users, fret not, you already enjoy a Firefox that’s optimized for 64-bit.

How do you get 64-bit Firefox?

If you’re running 64-bit Windows (here’s how to check), your Firefox may already be 64-bit. Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number:

• If you see “(32-bit)” and you are running Firefox 56.0 or older, updating to the latest Firefox version should automatically upgrade you to 64-bit.
• If you see “(32-bit)” and are running Firefox 56.0.1 or newer, then your computer may not meet the minimum memory requirement for 64-bit (3 GB RAM or more). You can still manually install 64-bit Firefox, if you choose.

If you need to run 32-bit Firefox or manually install 64-bit Firefox, you can simply download and re-run the Windows (32-bit or 64-bit) Firefox installer from the Firefox platforms and languages download page.

File Details
File Size	116.3 MB
License	Open Source
Operating System	Windows 7/8/10
Date Added	January 6, 2021
Total Downloads	71,585
Publisher	John T. Haller
Homepage	Mozilla Firefox Portable Edition

Publisher's Description

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.

Claims it is Windows XP Compatible
HAH
Firefox Extended Service Release v52 is XP Compatible but not Firefox v60
Could not try v60 in XP anyway as the 6 Virus threat warnings in Avast stopped me from installing this malware
Actual Rating is Minus 9000!

My review is for the newer versions of Portable Firefox like this one. Like the new Firefox, its terrible. I'm lucky enough to have an older version of Portable Firefox. Portable software in general is great. Able to access these programs from your flash drives. Almost impossible to find older version of this. But for some reason you like the new firefox, give this a try. Just remember you have to install if to your flash drive. When setting up, make sure you choose that.

The continuation of an excellent browser. In the past, I used Google Chrome, for a number of years. However, in the past couple of years I've been using FF and it has been the best of browsers and I've tried them all.
Ighome is my home page. It snaps to attention using FF and lags when using Chrome. Hands down, FF is the best browser out there.

FF has become a MAJOR memory hole.
After a few minutes, has consumed over a gig of memory and bogs down ridiculously. In their effort to get bigger and better, they got worse and worse.

Doesn't provide for importing bookmarks from installed version of FF?
Or have I missed something?

Guess this would be useful for some, especially for on the go. I keep Firefox from writing to hard drive simply by checking in the Privacy options to clear cache on exit. Nothing gets written to the cache folder that way, just goes to memory until the browser is closed.

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..

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!

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

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.

Pros: Could not find any Pros

Cons: Like the majority of software listed at Betanews, this one also triggers malware warnings

Bottom Line: Claims it is Windows XP Compatible
HAH
Firefox Extended Service Release v52 is XP Compatible but not Firefox v60
Could not try v60 in XP anyway as the 6 Virus threat warnings in Avast stopped me from installing this malware
Actual Rating is Minus 9000!

My review is for the newer versions of Portable Firefox like this one. Like the new Firefox, its terrible. I'm lucky enough to have an older version of Portable Firefox. Portable software in general is great. Able to access these programs from your flash drives. Almost impossible to find older version of this. But for some reason you like the new firefox, give this a try. Just remember you have to install if to your flash drive. When setting up, make sure you choose that.

The continuation of an excellent browser. In the past, I used Google Chrome, for a number of years. However, in the past couple of years I've been using FF and it has been the best of browsers and I've tried them all.
Ighome is my home page. It snaps to attention using FF and lags when using Chrome. Hands down, FF is the best browser out there.

FF has become a MAJOR memory hole.
After a few minutes, has consumed over a gig of memory and bogs down ridiculously. In their effort to get bigger and better, they got worse and worse.

Doesn't provide for importing bookmarks from installed version of FF?
Or have I missed something?

Guess this would be useful for some, especially for on the go. I keep Firefox from writing to hard drive simply by checking in the Privacy options to clear cache on exit. Nothing gets written to the cache folder that way, just goes to memory until the browser is closed.

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..

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!

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

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.

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.

FF 7 simply does not do what it says it does. Resources consumption has reduced slightly but no where near the 50% they claim. It looks and performs like a dated browser.
As for this portable version, it's not really portable seeing as it leaves folders all over the host computer

Mozilla Firefox Portable Old Version

great if a virus has crippled the browser and you need to load off a USB !

Mozilla Firefox Portable Version

5/5
And PORTABLE !!!

Mozilla Firefox Portable Edition Download

One of the BEST Browser nd the Best in Quality nd Features..
Very Customisable
Fast
Bloat Free
Up there With Chromium , Opera ND Safari