Sites using flash/shockwave cause Firefox to hang.

If the shockwave flash plugin is enabled on version >22, visiting a site that contains flash content will cause Firefox to hang/react extremely slowly. I've tried disabling all add-ons with no effect.
I'm using shockwave flash 11.2.r202.310 but it doesn't seem to matter when version of flash I use.

Thanks for the replies guys.
ComputerWhiz: No firewall or AV installed on my laptop.
cor-el: Nothing works. It is the shockwave flash plugin + >=v23 that is the problem. I've tried safemode, I've completely deleted everything eg moving the .mozilla directory and started a virgin firefox with the same results.

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    Good work jc! You are a good student:-) All Java add ons in IE are correct and FF also. Nice.
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    Thanks for the replies guys.
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    cor-el: Nothing works. It is the shockwave flash plugin + >=v23 that is the problem. I've tried safemode, I've completely deleted everything eg moving the .mozilla directory and started a virgin firefox with the same results.

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