Firefox

Which Version of Firefox Am I Using?

Firefox isn’t the go-to alternative browser that it used to be, but it’s still a favorite among power users and open source advocates. Here’s a brief guide on how to find out what version of Firefox you’re using…and what the different versions actually mean.

Finding the Version Number

In the latest versions of Firefox on Windows or Linux, click the “hamburger” menu in the upper-right corner (the one with three horizontal lines).

In the bottom of the drop-down menu, click the “i” button. Then click “About Firefox.”

The small window that appears will show you Firefox’s release and version number. Click “What’s new” for a look at the release notes.

On a Mac, the process is a little different. Just click “Firefox” in the menu bar, then “About Firefox.”

Release Versions: How Stable Are You?

Firefox comes in four primary versions: the standard release, the beta version, the developer edition, and nightly builds. Here’s what that means.

Stable

This is the current release of Firefox, the one that the vast majority of users have installed. All the features have been thoroughly tested and are ready for use by the general public. Users of the stable release don’t get access to the newest tweaks and features, but it’s the one you want if you don’t like surprises in a crucial tool on your computer.

Beta

The beta release is one “version” ahead of the stable release—at the time of writing, the stable build of Firefox is on version 53, but the beta is on version 54. This version is for those who want access to the new features a little faster. Features that make it…

How to Upgrade Firefox from 32-bit to 64-bit in Windows Without Reinstalling

Most web browsers are installed in Windows as 64-bit versions by default, Firefox being the exception. If you installed the default download of Firefox, you have the 32-bit version, not the 64-bit version, even if you’re running a 64-bit version of Windows.

Say you recently got a new Windows computer. After installing the 32-bit version of Firefox from the main page, you installed your favorite add-ons, restored your backed up bookmarks, and even set up multiple profiles for personal and work purposes. But, now you want to upgrade to the 64-bit version of Firefox for better performance. You could uninstall the 32-bit version and then install the 64-bit version, but doing so will remove your Firefox user data, such as saved passwords, bookmarks, settings, extensions, and themes.

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You could back up your profile folders from the 32-bit version of Firefox and then restore them after uninstalling Firefox and installing the 64-bit version. But that’s a bit of a hassle, and there is an easier way.

NOTE: Firefox 64-bit can only be installed on 64-bit Windows. If you’re not sure which version of Windows you’re running, you can easily check. If you’re running 32-bit Windows, you cannot upgrade Firefox to 64-bit.

If you’re not sure if you’re running 32-bit or 64-bit Firefox,…

How to Check if You Are Running a 32-bit or 64-bit Version of Firefox

Firefox is available in both 32-bit and 64-bit versions for Windows 7, 8, and 10. If you’re curious which version you’re running, we’ll show a couple of easy ways to find out.

Using the About Firefox Box

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.