Sort of worked it out, Mine stays on safe mode because of me shuttign the computer down whilst it was trying to update. Heres one of the ways to get it off safe mode:
1. Right click the firfox icon and select "Properties"
2. Select "Shout cut" In the tab menu
3. the file path will have "-safe-mode" at the end of it
4. delete the ending, click "apply" adn then "ok"
If the problem is still there, take a look at the mozilla forums.
Please rember to comment, rate and subscribe! Thanks!