Firefox 3.6.3 &.4 uses 100% of CPU and not will not always open or close

Firefox intermittently uses 100% of CPU and I have to manually turn off the computer. Firefox starts or finiosh correctly, the process is alive and that I have to use the Task Manager to end the process until I installed IE7, as I can not access banking by internet with Firefox. Very disappointing as I have ben an enthusiastic user and promoter of FF.

This has happened

Each time Firefox opened

== After upgrade to 3.6.3 and isn't better with 3.6.4, despite the removal of all add-ons

I have exactly the same problem. FF stay below 50% CPU.

Tags: Firefox

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