It's often important to know what version of Firefox you are using, to help you troubleshoot a problem or just to know if Firefox is up to date. Here is how you can find out.
Firefox was created by Dave Hyatt and Blake Ross as an experimental branch of the Mozilla browser, first released as Firefox 1.0 on November 9, 2004. Starting with version 5.0, a rapid release cycle was put into effect, resulting in a new major version release every six weeks. File downloads are saved in the folder specified in Firefox Options Preferences Settings Preferences. To change that folder: In the Menu bar at the top of the screen, click Firefox and select Preferences. Click the menu button and select Options. In the General panel, find the Downloads section under Files and Applications.
Find Firefox Version Linux
Click the menu button , click Help and select About Firefox.On the menu bar, click the Firefox menu and select About Firefox. The About Firefox window will appear. The version number is listed underneath the Firefox name.
Here is an example of what the About Firefox window will look like:
Find Firefox Version
Opening the About Firefox window will, by default, start an update check. If an updated version of Firefox is available, it will be automatically downloaded. On Linux, this will happen only if you use a build downloaded from Mozilla's website; otherwise, updates will come through your Package Manager. For more information, see Update Firefox to the latest release.
Find Firefox Version Command Line