I just disabled adblock and instead of just a grey box with my city in it, it's a banner ad targeted to my city.
So that solves the "what is it" question, but I still wonder how it knows where I live, and I don't like that at all.
_________________
Transgender. Call me 'he' please. I'm a guy.
Diagnosed Bipolar and Aspergers (questioning the ASD diagnosis).
Free speech means the right to shout 'theatre' in a crowded fire.
--Abbie Hoffman