1999
Google engineers want to make ad-blocking (near) impossible
(stackdiary.com)
This is a most excellent place for technology news and articles.
Web devs can be pretty lazy and only want to support Chrome anyway. If Chrome is the only browser offering certain features ("proof" that user is human, potentially getting rid of adblockers altogether, etc), that's a good excuse to finally just stop supporting Firefox and Safari.
Didn't Microsoft try and do this with Silverlight back in the day?