I get this yellow bar at the top of my screen asking if I want to see coupons. It is not a toolbar. To the best of my knowledge, it is not an add-on. (If it is, it has an obscure name.) I don't remember installing anything like this. It is not on the list of programs that I can delete. I want to be rid of this nuisance.
NOTE: Cloudfront.net powers many applications on the Amazon AWS platform. In the event that blocking only "d3lvr7yuk4uaui.cloudfront.net" does not work, a last resort would be blocking the entire domain. (Most likely, you will not encounter any issues in doing so.) To block the entire domain, add this entry to the hosts file: 127.0.0.1 cloudfront.net
4. Save the "hosts" file, clear all of your browser caches, and restart your computer.