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Whole browser is crashing and going extremely slowly, causing my computer to crash.

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When i try to open Firefox 4.0 the whole browser is extremely slow and makes my whole computer lag which should not be occurring because I have a Macbook Pro i7. Safari is working perfectly fine but Firefox does not. How can this problem be fixed?

When i try to open Firefox 4.0 the whole browser is extremely slow and makes my whole computer lag which should not be occurring because I have a Macbook Pro i7. Safari is working perfectly fine but Firefox does not. How can this problem be fixed?

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I'm having the same problem on Windows XP SP3 with the newest Firefox I could download today (4.0.2 or so?). I've just wiped out my profile, uninstalled ff, deleted everything remaining in C:\Program Files\Mozilla Firefox aswell as in the Application Data and Local Settings\Application Data, started in safe mode, disabled ALL extensions & plugins but all of these don't make a change.

Firefox keeps being freaking slow lagging my whole computer, the addons tab freezes for a long time aswell. In the firefox 4 beta 4 or 5 it was running great. It's really impossible to browse in this state, so I'm using Chrome now, which never has such bad problems. Firefox sucks :(

(I got a quad core with 3.5 gigs ram so my specs shouldnt be the cause)

Endret av tyronx