Find what version of Firefox you are using

Revision Information
  • Revision id: 50947
  • Created:
  • Creator: AliceWyman
  • Comment: made the steps to open the Help menu the same
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: AliceWyman
Revision Source
Revision Content

It is often important to know which version of Firefox you are using. You can find out your Firefox version using one of these methods:

Using the About Mozilla Firefox window

To access this window:

  • At the top of the Firefox window, click the Firefox button, go over to the Help menu and select About Firefox.On the menu bar, click the Firefox menu and select About Firefox.At the top of the Firefox window, click the Help menu and select About Firefox.

The About Mozilla Firefox window will appear. Your version number is listed underneath the Firefox name.

AboutFirefox-Fx5Mac


AboutFirefox-Win7v2501

Note: Opening the About Mozilla Firefox window will, by default, start an update check to see if an updated version of Firefox is available. For more information, see Update Firefox to the latest release.

Using the Troubleshooting Information page

You can find out your Firefox version without starting an update check by using the Troubleshooting Information page. To access this page:

  • At the top of the Firefox window, click the Firefox button, go over to the Help menu and select Troubleshooting Information.On the menu bar, click the Firefox menu and select Troubleshooting Information.At the top of the Firefox window, click the Help menu and select Troubleshooting Information.

The Troubleshooting Information page with the address about:support will appear in a new tab. Your Firefox version number is listed under the Application Basics section.

Fx25Win7AppBasicsVersion

For more information about this page, see the Use the Troubleshooting Information page to help fix Firefox issues article.