There are a few posts already about this problem, where FF windows will not resize from maximum via the restore down button, but instead minimize to the toolbar...and vice versa, you can only maximize the window from the minimized position. After searching for solutions to this problem, I saw one post that suggested closing Firefox (I have 13.0.1), then opening it in Safe Mode. I'm running Windows Vista and couldn't find how to open FF that way, but instead I ran FF as administrator and the problem was solved! I wanted to share this solution to help others in previous posts, but the threads have been locked and marked as Solved, which is why I am posting this 'question'. Just In Case there is anyone out there who also is seeking solutions to the problem! (And also to perhaps encourage administrators to keep threads open a Little bit longer...it would seem that several so-called 'solved' problems actually are not. Thanks!