This. For all that people handwring about "Won't somebody please think of our ad revenue!", I consider installing some kind of adblocker more or less a standard safety measure for the web. A huge volume of browser-vectored malware comes from bad ad clicks, and even I've made a mistake or two in the past clicking on bogus download buttons and the like.
µBlock is especially good for this as some of the lists have additional rules specifically targeting malware sources, and it can block things like actual script tags and such instead of just hosts.
people defending ad blockers tend to say this, but that's not true. As much effort in advertisement is about validating your product as it is about selling it. No one buys a BMW from an online ad, but yet here it is! http://i.imgur.com/QCDc2gl.png
Well it's not there to sell cars so much as it is to say to the public "BMW are valid cars"
As an aside, I wonder how prevalent the adware would be when searching for "download chrome"?