This add-on has been given Recommended status, yet the developer was blindsided by Mozilla’s decision to reinvent the concept:
This is certainly not the right way to encourage developers to spend their time advancing Firefox if they then suddenly find themselves facing “in-house competition.”
It would be neat, I guess, but people who want an ad blocker outnumber you a thousand to one. I think that should take priority if we’re going to go down the “make an extension more secure by including it in the browser” route.
Ironically, uBlock Origin Lite also got temporarily blacklisted by Mozilla, causing the developer to drop Firefox support for it entirely.