To be clear, I'm not sure a browser should have a say on this in general, but I understand the argument they make on a personal level.
EDIT:
1. I misread OP
2. I don't work directly with our ad handling, as I work with the editorial team and generally advertising and editorial are separate for a reason, but I went digging just for fun. We sell our ad space to individual businesses. Our ad sales team does approve every ad we run. We use Google Analytics and Chartbeat, and both the newsroom and ad team have access to those analytics. The ads we serve vary - one ad from a housing complex down the street is literally just an image with an affiliate link, but one ad from our the ASU Foundation appears to load content from doubleclick.net.