Remember "popup spam" and then how enough windows would open that none would respond?
I'm guessing anyone who didn't get browser crashes in the 90s was only browsing a couple of sites or something. Certainly anything before IE5.5 was crash city - in particular Netscape 2.0!
I lost track of how many times I saw the spinning beachball of doom. The only solution for which was the power off and on again.