Macbook pro.minimize button is inactive. Finder menu bar and dock won't appear when firefox is open. not occuring with safari. have to click on desktop to get Finder menu bar and dock to reappear. think happens after update of something. How do I fix it?

When i open firefox it opens up full screen (as it always has) but now the minimize button is grey (not yellow) and inactive so i can only open (green button) or close (red button) my firefox window. I can still make it smaller by dragging the bottom right corner but i can't minimize it to my dock or anything. Also, I have my dock set to auto show/hide when i roll my pointer over it. Now, whenever Firefox is open (no matter what size the window is) the Finder menu bar (with the time, battery power, etc) does not show up (which it always has before) and my dock won't auto appear when i roll my pointer over it.

Can you check this issue on Firefox 9?
* getfirefox.com

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