Find what version of Waterfox you are using
It’s often important to know what version of Waterfox you are using, to help you troubleshoot a problem or just to know if Waterfox is up to date. Here is how you can find out.
Click the menu button 
, click Help and select About Waterfox. The About Waterfox window will appear. The version number is listed underneath the Waterfox name.
Here is an example of what the About Waterfox window will look like:
Opening the About Waterfox window will, by default, start an update check. If an updated version of Waterfox is available, it will be automatically downloaded. For more information, see Update Waterfox to the latest release.