HOW CAN I GET A PLAIN FREE BACKGROUND FOR FIREFOX?
Can you explain what you want, and please don't use all caps.
Firefox has personas that go behind the toolbars and make them hare to read, are you looking for a plain pastel background for toolbars.
You're on a Mac so it does not involve Window Aero transparency.
Where is this background supposed to be.
I color my toolbars so I can identify one profile from another