This tutorial provides the steps required to enable or activate the fullscreen mode in Firefox.
Activate Fullscreen Mode
Click the Menu Icon at the top right corner as highlighted in Fig 1 and marked as point 1.
Now click the Square Icon as highlighted in Fig 1 and marked as point 2. This will activate or enable the full screen mode in Firefox and it will occupy the 100% width and height of the screen.
We can also enable the full screen mode in Firefox by simply pressing the F11 Key. We can use the shortcut F11 to activate fullscreen mode in Firefox.
Exit Fullscreen Mode
Now press F11 to exit the full screen mode in Firefox.
Summary
This tutorial provided the steps to activate the fullscreen mode in Firefox browser. It also provided the steps to exit the fullscreen mode in Firefox.