I just updated to the latest Mac version of Firefox per a prompt on my browser. After the upgrade much of the text on my screen looks like this:
Hello Chrome . . .
Update: Now I see I unwittingly downloaded the beta for 3.6.4 and its crashing and screwed up the Internet. I don’t know why I was prompted to download it. I suppose it’s my fault for not looking more carefully at the message and mindlessly updating like some sort of Pavlovian fool.