I got the same problem..it's annoying

I have a similar issue, but without the toolbar. Fullscreen automatically hides all Firefox toolbar. Hovering cursor at the top of the screen reveals Firefox tool/nav bars, overlayed with the Mac file menubar. Clumsy.

in the address bar type the following

about:config

press enter and accept the warning, in the filter box type full screen and find the parameter that says something like autohide

Change this to false.... restart firefox :)

Great Result @mds1256. Thanks!

The bookmark toolbar is still concealed. Is there anyway to change that?

I see, didn't notice that as I don't have that tool bar visible any way. But yes I see what you mean, looks like a bug I think.

same here, bookmark toolbar is still missing!

thanks mds1256, was about to declare you a genius, but yes, the bookmarks have now disappeared :(

Why has been selected as a chosen solution when the resulting comments clearly demonstrate a continuing issue?!

same here, autohide is set to false in about:config

No bookmark toolbar

thanks.