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Is Firefox 32-bit or 64-bit?
Do I need a 64-bit version of Firefox?
How do I know if my Firefox is 64-bit?
Does Firefox work on Windows 8.1?
Aug 27, 2021 · To see if the 32-bit or 64-bit version of Firefox is installed, locate Mozilla Firefox in the list of programs. The program name will be followed by the the bit version and language, in parentheses. If the program name contains x86, the 32-bit version of Firefox is installed.
- Firefox for Windows 64-Bit
Check your Firefox version (in the “About Firefox” window)...
- Firefox for Windows 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.
- Using the About Firefox Box
- Using the Troubleshooting Information Page
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The simplest method for finding this information is opening the About Firefox box. However, before continuing, be aware that opening the About Firefox box causes Firefox to automatically update, if there's an available update. So, if you'd rather not update Firefox right now, skip to the next section for another easy method.
To check if Firefox is 32-bit or 64-bit using the About Firefox box, click the Firefox menu in the upper-right corner of the window and then click the Help icon at the bottom of the menu.
On the Help pane that slides out, click the "About Firefox" option.
If you're running a 32-bit version of Firefox, it will say "(32-bit)" next to the version number on the About Mozilla Firefox box.
If you don't want Firefox to automatically update right now, you can check whether Firefox is 32-bit or 64-bit on the Troubleshooting Information page. To do this, click the Firefox menu in the upper-right corner of the window and then click the Help icon at the bottom of the menu.
On the Help pane that slides out, click the "Troubleshooting Information" option.
The Troubleshooting Information page displays on a new tab. Look at the "User Agent" section under Application Basics. If it says "WOW64", you're running the 32-bit version of Firefox.
If it says "Win64", you're running the 64-bit version.
If the User Agent section on the Troubleshooting Information page doesn't say either "WOW64" or "Win64", then you're running a 32-bit version of Windows, and you cannot run a 64-bit version of Firefox.
If you use Chrome, you can also check whether you are running a 32-bit or 64-bit version of Chrome.
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Jan 8, 2016 · How to tell if Firefox is 32-bit or 64-bit. Mozilla published the Windows 64-bit installer for Firefox to the Download page with yesterday’s release of Firefox 43.0. You must have a 64-bit version of Windows to take advantage of the new version of the browser.
- In Firefox, type about:support in the the URL window. If you have the menu display turned on, this is also accessible under Help | Troubleshooting...
- How to tell if Firefox is 32-bit or 64-bit. Mozilla published the Windows 64-bit installer for Firefox to the Download page with yesterday’s relea...
- This is being added to the About dialog in Firefox 51, as tracked in bug 597738: (Screenshots by Chris Peterson attached to the Bugzilla bug.)
- More then likely the browser is 32-bit unless you have downloaded an unofficial build. Firefox has a 64-bit Nightly build, but this build is for te...
Dec 20, 2015 · If you had 64-bit Firefox on 64-bit it would show Win64 in useragent. Windows users downloading from www.mozilla.org will get 32-bit Firefox so if you want Win64 Firefox go to the Systems &Languages link which is www.mozilla.org/firefox/all/
Mar 28, 2013 · Note that on Windows you will normally be using 32bit versions of Firefox. The 64bit versions for Windows are experimental and unsupported. You would be unlikely to accidentally use 64bit Firefox on Windows. I have marked iNerd's answer as the thread solution.
Jan 27, 2024 · Learn how to determine if your Firefox browser is 32-bit or 64-bit with simple steps and understand the significance of each version for optimal performance.
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