I have Firefox 5.0.1 installed on Windows 7 64-bit. A few weeks ago, Firefox started to get the "not responding" error for about a minute or two, after which it went away and I could browse normally again. This happens every ten minutes or so.
I ran Firefox in safe mode for a while, but the same thing happened. It's totally random. Whether I'm using Flash or not, it happens just the same. Flash audio continues while Firefox freezes.
After uninstalling and wiping all the extra directories, I reinstalled. But the same thing happened again.
After this, I tried Palemoon. Virtually the same thing happened.
I've tried switching to Google Chrome, but it's sluggishly slow once I get 10+ tabs open. Opera is just too different for me and I'm not going to Internet Explorer or Safari.
Does anyone have any ideas what might be going on here?