Windows 7 Aero glitching with firefox 29.0.1

Windows 7s aero theme is glitching with firefox only. When I hover over the firefox icon on the taskbar, it doesnt display the firefox windows as the miniatures. if I click on an empty space and THEN hover, it will display the windows available as miniatures. if I click on one of them it flashes for an instant and then minimizes. I cant alt+Tab into any windows that become minimized also. if I click on the firefox icon to select a window it flashes for a split second then goes away and I cant click on anything.
basically the aero functions for firefox arent working. and it only seems to be affecting firefox.
steps taken so far:
system restore to a previous point. this helped for about 5 minutes then it went back to the problem.
closing firefox, restarting it, closing it, restarting computer, opening, closing rinse repeat.
manually selecting the window I need from the task manager and selecting "switch to" works to bring it up but thats the only way ive found to open the windows once theyve been minimized.
also cleared the registry and backed it up but the problem happened before that.
removed/unpinned it from taskbar and repinning it. didnt help.
what else can I try?
specs:
windows 7 x64 ultimate
core i3-2100
24GB Ram
Nvidia GeForce GTX 660 2GB
firefox version: 29.0.1

Firefox has hardware acceleration set to "on" by default, but it's still young, which means some video cards or drivers might have problems with it. You can try to disable hardware acceleration to see if that alleviates your problems.
You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).
Then perform these steps for Firefox version 29.0 and above:
*Click the menu button [[Image:New Fx Menu]] and select Options for Windows or Preferences on Mac or Linux. For Firefox 28.0 and previous versions, click the orange Firefox button at the top left, then select the "Options" button, or, if there is no Firefox button at the top, go to Tools > Options.
*In the Firefox options window, click the ''Advanced'' tab, then select "General".
*In the settings list, you should find the ''Use hardware acceleration when available'' checkbox. Uncheck this checkbox.
*Now, restart Firefox and see if the problems persist.
Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:
* [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]
* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]

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