what mac do u have?
I could be wrong, but I think you might have to pull the corners of the page out to make bigger (click them & drag them out until the screen is the right size) I THINK it stays that way then.
Enjoy your lack of add-ons. Even Google Chrome and Opera have add-ons. No advertisements for me.Firefox is shite, only for those who have nothing better than IE, Safari is the superior browser.