Do not want to upgrade, still on Mac ppc
Go to Solution.
go to About:config and find plugins.hide_infobar_for_outdated_plugin then double-click on it, to toggle it to "true".
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.
Thanx so much, it worked, Cheers to you !!!!!!!!!
Seems to be the secret to regaining control of Firefox! thank you very much!!!!