I still find that absurd. People actually want extensions and add-ons that get full access to their computer, can manipulate pretty much any of the browser functionality, and has been known in the past to be abused? (See noscript for example.)

I will admit when I first began using Chrome some years ago I found extensions to be woefully incomplete. But even where integration is worse, I'm super glad about the approach taken with WebExtensions for exposing functionality. It gives a reasonable bound on what extensions can do, and it provides a nice API that is stable.