Firefox disables my QuicktimePlayer plugin, although the plugin-check says it is up to date

I am running Firefox 21 (I have not been prompted to update to 22 yet) on MacOS 10.6.8 and in the last two days when I try to view a page that requires the QuicktimePlayer plugin, I see an error message saying that the plugin is outdated and it has been disabled for safety reasons. I can re-activate it from the red icon that appears on the left of the address bar, but what I have noticed is that when I do the plugin check, QuicktimePlayer appears to be up to date! The version of the plugin is 7.6.6 and there is no newer version for my system as far as I know. Is there any way to fix this or is it a known bug?

QuickTime Plugin 7.7.0 and lower (click-to-play), Mac OS X has been blocked for your protection.
check: https://addons.mozilla.org/en-US/firefox/blocked/p408
The plugin is being checked at the moment (see https://bugzilla.mozilla.org/show_bug.cgi?id=837377) so lets keep fingers crossed to see the problem resolved.

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[http://malwaretips.com/blogs/remove-supreme-savings/ remove supreme saving guide]

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Firefox disables my QuicktimePlayer plugin, although the plugin-check says it is up to date

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