3.6.11 seems to be much more cpu heavy...

After I installed version 3.6.11, Firefox seemed to run more slowly. The cpu usage spikes frequently even when I'm not on any active websites and it tends to be unresponsive when this happens.

Well, in safe mode things seem a bit better but still Firefox uses 16%-22% CPU resources when minimized doing nothing. Question is what now? Sorting out addons one by one?
Thing it that Firefox does not shows the problem immediately after restart. It takes 10-20 minutes before it starts to 'eat' my CPU resources...

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