I noticed it recently to (one was a case of a virus though) but others are add (instaal the add block add on) and that got rid of most but there is still one that won't go away its not a virus and its not being blocked by add block.
My dad got the same one as have other people I know, it is the same format or layout every single time, it s question air /quiz and it can happen just by clicking a link in YouTube to another video or just browsing amazone ect...when on amazone or some other sites it micics that site and ask me to take a quiz for amazone, and again on other other sites, it quite cool how it adapts its self to the site I am browsing.
I can't work out how to stop it though but there are some settings in chrome to change that will stop it as that's what my dad did to stop them.?
Next time you get itr and you copy and paste the URL here. I will do the same next time I am on.
I have had such bad luck with pop ups lately I duno why lol.