Where's Firefox

Hi All
Have just installed Firefox on my ATV and can’t find it anywhere, what am I doing wrong?
Am on 4.1.5 and upto date with everything and done a reboot.

AH found it.
Only problem is I can’t get back to the main menu :roll:

Pressing menu on the Apple remote will return you to the normal AppleTV menus.

Where? Cause I sure can't

 I'm pressing the menu button and still can't get out of Firefox.  

enable the applications in categories and there you have it.

In Nito TV enable the Application category and there you have it.

I´ve  installed Firefox but can´t find it despite this topic...

I´m fairly new to this SW so PLZ!!!