Mozilla has just released Firefox 3.6.6, less than a week after the release of the long-awaited Firefox 3.6.4 version. Firefox 3.6.6 fixes a stability issue in the web browser. This update addressed issues with the new plugin handler causing issues with the immensely popular Facebook game Farmville. See bug 574905 for full details.
Firefox 3.6.6 modifies the crash protection feature to increase the amount of time that plugins are allowed to be non-responsive before being terminated.
The developers have increased the time that plugins are allowed to be non-responsive before they are terminated by the browser. The timeout was set to 10 seconds initially and now has been increased to 45 seconds in this new release.