A few days ago Mozilla released Firefox 3.6.6 with Crash protection against plugins, however, it looks like they had to fix a few bugs with the release and have had to release Firefox 3.6.6.
According to the an update on the Mozilla blog, Mozilla has released the Firefox 3.6.6 update where they increase the amount of time for a plugin to remain frozen before they terminate it.
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Firefox 3.6.6
