Had the same stuff, too.
It's not about Ad Block, it's another browser extension which just installs itself (Third-party extension). Check your browser plugins etc., I'm sure you will find this shit somewhere there and uninstall it. Happens lately to multiple browser and all of them are aware of the problem and working on it.
A friend of mine helped me get rid of the rest this shit might (possibly) place on your pc, I'm not at home right now, so I'm gonna add a link to the program for you later.