Cosmetic adblocking shouldn't be included in browsers, no. It doesn't scale and is easy to break. It just puts a gigantic target on your back.
Firefox already blocks a lot of ads by blocking tracking scripts. Including a cosmetic adblocker like Brave would lead to worse compat and broken experiences.
> They probably should't have ended support for legacy add-ons.
They should've actually. Firefox was a single-process mess for years with poor sandboxing, because Mozilla was scared of breaking everyones add-ons. The move to WebExtensions was the right one, if a bit late. If the whiners got their way, every extension would be breaking right now because of Fission. The old model also had no permission system.
Firefox already blocks a lot of ads by blocking tracking scripts. Including a cosmetic adblocker like Brave would lead to worse compat and broken experiences.
> They probably should't have ended support for legacy add-ons.
They should've actually. Firefox was a single-process mess for years with poor sandboxing, because Mozilla was scared of breaking everyones add-ons. The move to WebExtensions was the right one, if a bit late. If the whiners got their way, every extension would be breaking right now because of Fission. The old model also had no permission system.