Okay, I give up. I can't make sense of any of this and it's mostly just annoying. A couple of days ago, avast started popping up with messages that it saved me from malware. It pops up almost every time I watch a video or open a new page. My activity since last Thursday has been spent playing the new expansion on WoW. The only stuff I've downloaded has been updating my addons through the curse downloader.
The only information I could find was that it might be a result of a chrome extension. I don't have that many and avast has told me that they are all safe. I did a full scan and a browser cleanup through avast. I used ccleaner and malwarebytes. The avast pop-ups still persist.
Doing some searches, I came across
this list from howtogeek.com. Didn't have any of those extensions that sold out to ad companies. The malware is coming from extensionstats.com and it is being blocked. But how is avast picking up that part and not finding the source of it and how do I stop it?