I had bought into the Firefox ecosystem down to their password manager and would have paid for premium services. Remove the ability to adblock on mobile and I'm pulling out of the entire ecosystem. What a betrayal. They don't even have any skin in the ad game
They are working on WebExtension support [1] as well as built-in basic ad-blocking [2]. Anyone can follow the progress on their public issue tracker on GitHub.
As someone who was deeply disappointed when they broke all old extensions before fixing the new API (but had nowhere to go as Chrome had always had neutered extensions compared to Firefox) I hope they'll fix the extension interface first this time.