Well, I have Mozilla's back personally since I've always used only Firefox ever since version 1 and never used Chrome except for trying it out for a test drive

Well, I have Mozilla's back personally since I've always used only Firefox ever since version 1 and never used Chrome except for trying it out for a test drive from time to time, but the millions of Firefox users worldwide will now have one more reason to jump ship to Chrome and that's something Firefox can't afford at this point. Built-in ad blocking is just too good to pass up. Firefox needs to implement their own version soon, IMO.