How do I reverse Firefox' fullscreen mode.

**Cbhihe** · July 23rd, 2014

( I am not sure about whether this is a Firefox or an Ubuntu issue, so I also ventured to post this on support.mozilla.org - either way I will report a solution when I get it.)

I run Fx 30.0 on Ubuntu Trusty 14.04 desktop edition LTS. Have done so for the past few months without any Ubuntu specific problem.

Just today Fx started launching exclusively in Ffull-screen mode. I have no access to either the Fx menu bar (above) or to any Fx settings. The only thing I can do to get out of Fx is kill the process with
> kill -9 [PID #]
from a terminal window.
The full screen mode also seems to prevent my use of the Launch bar, as it seems to interfere with the mouse pointer touching the active edge of the screen.
Meanwhile all my usual keyboard shortcuts under Fx seem to work.
Can anybody suggest how to get back to normal mode ?

Tx.
-ced

**coffeecat** · July 23rd, 2014

F11 should do the trick!

**kc1di** · July 23rd, 2014

also here's the Firefox page about full screen mode.

**Cbhihe** · July 24th, 2014

@coffeecat
Yes it did. Thank you.
I did not know about F11 as I generally don't use F-keys much.
That solved it.

@kc1di
I initially thought something was wrong with my localstore.rdf, taking a hint from someone more used to Windows env, whereas in fact I had accidentally hit the full screen icon lying around on my tool bar.

This basic error was rather lame of me, but I appreciate the quick pointers. Thank you both.