[amenod]

To be fair, this is not (just) OP's fault. Under no circumstances should just visiting a page render your computer unusable, your browser should protect you from that. I know that none of them do, but sooner or later browser vendors will have to realize that they have become the new OS and act accordingly (that is, allow user to easily control misbehaving pages - see their resource consumption, limit them, kill them...). Never should your computer become unresponsive just because some page wanted more CPU time / memory / ...