Firefox randomly stops working

So I've had this problem for a while now, and it's began to bug me. What basically happens is I'll be browsing the web, and all of a sudden Firefox stops loading pages. What I mean by this is when I click on links, nothing happens, if I open a new tab and try to open a link there, nothing happens, and on the status bar it says "Done". Once I quit Firefox and reopen it, everything works fine, only to become like this later on. My internet works while all of this is happening, so I know for sure it's something up with Firefox. I have version 3.0.1 installed.

Any idea what's going on?

Thanks!

mark r23,
I have had FF 3.0.1 freezing up on my Macbook, so I just use Safari now. I think it is a glitch in the FF for Mac version. FF works fine on my PC and I have 1GB RAM in each computer. Might use it again on the Macbook when they iron out the glitches.

this happens to me all the time.
i usually just relaunch firefox, but that's annoying when you're researching important material for school

i started to use safari, and still had this issue

hopefully someone has an answer for us!

I have had the same problem in all of the beta versions of firefox. I have reported it, but nothing have come if it yet.