How to determine the version of Firefox that you are running

Mac

  1. Select the Firefox menu, then "About Firefox."

    firefox menu with about firefox selected underneath

  2. In the display window, the version will appear below the word Firefox

 

Windows

Newer versions of Firefox

  1. Click the Menu button in the top right corner
  2. Select the Help option at the bottom of the menu
    Firefox menu screen


  3. Select "About Firefox"
    Firefox pull down menu

  4. A dialogue box will appear and the version number will be located underneath the word Firefox
    Firefox system info screen