Do you have that problem when running in the Firefox SafeMode? http://support.mozilla.com/en-US/kb/Safe+Mode Don't select anything right now, just use "Continue in SafeMode."

If not, see this: http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+theme...

My problem is solved by downgrading to 6.0.1. I noticed Firefox 6.0.2 freezes (not responding) a lot. Then one day I used my old laptop (using 6.0.1) and it runs perfectly. Right now I am using 6.0.1 for more than two hours and not yet encounter any errors. xD

I have not yet installed all my addons and test them all out. But as of now, my addons/extensions are: IDM,Norton toolbar, and multi links. Java and all other native plug-ins are still enabled.

I would recommended you saved all favorites and addons list prior to downgrading. Before downgrading, uninstall current firefox and check box that remove everything to prevent reoccurring problem.

Hope this help you all. google firefox 6.0.1 download and you should be able to find some links. mozilla/firefox doesn't have 6.0.1 for download, so don't bother searching it on mozilla.com.