At this point, I wonder why Firefox doesn't have a vivaldi-like tracker and ad block interface.
Perhaps it has to do with being a Google-funded browser.
I wonder how hard that would be to implement for someone who knew how to do it? Or if the code for that in vivaldi is open source?
It does. Click the little shield in the address bar. I assume it blocks some ads even if it's not as effective as uBlock Origin.