It is often important to know what version of Firefox you have to help you troubleshoot a problem or just so you will know if it is up to date. Here is how to find out.

  • Click on the Help link at the top, left-hand corner.
  • Click About Firefox.
  • The About Firefox window will appear. The version number is listed underneath the Firefox name.
Note: Opening the About 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 version.