Shows promise. Not quite comprehensive yet. – Firefox Focus: Privacy browser Review

I just finished a round of research and testing of the ad-blocking landscape for iOS. I had moderately good results with Focus. It is clean and installed easily. However, it was missing a number of features that other blockers have. Also, it failed to block a number of items during my testing. It is probably the best of the free blockers that are still maintained. I hope they keep it updated.
Review by FCGreg on Firefox Focus: Privacy browser.