To find out which version of Firefox you’re using follow these steps.
On a Mac.
- Open your Firefox browser
- On the menu bar, click the Firefox menu and select About Firefox.
- The About Firefox window will appear. Your version number is listed underneath the Firefox name.
On a PC
- Open your Firefox browser
- On the menu bar, click the Help menu and select About Firefox.
- The About Firefox window will appear. Your version number is listed underneath the Firefox name.