At some point as as community need to recognize that we're grossly out of touch with how people outside our bubble use computers. Browsers are the #1 consumer attack target and have been plagued with all forms of malware since before IE6 -- malicious plugins, extensions, DLL hacks, history harvesting, apps that override settings to push adware.

It's not that surprising that browsers are trying to go on the defensive, Firefox shipped extension signing and Google is trying an active scanner.

It sucks for our bubble but that's ignoring the huge number of people with horribly infected browsers that are about to be cleaned of malware.

In fact, I would go so far as to say - any app scanning all the files on a computer is a bad idea.