[raxxorraxor]

This argument of allegedly hostile addons is true to an extend. They theoretically do indeed have access to your browsing, just like your browser has access to your browsing.

However the security argument was used to inhibit ad blockers and get more control about browsers, an already quite restricted ecology. I gladly have the option to vet addons myself just like I do vet browser vendors. Some of the later and attached companies might have questionable goals.

For me this feature of Firefox is the least important, but demands differ I guess.