Comment by _delirium

I'd consider myself pretty tech-savvy, and I'm still unsure how exactly to do that. The last I heard, I had to individually block each site that I didn't want my data shared with, and the only three I've seen mentioned are Yelp, Pandora, and Microsoft Docs. Is there some place I can monitor for new additions? Or is there a way I can just say, "block all apps by default unless I explicitly enable them?"