I think the best alternative would be LibreWolf
Level 5: Handle cookies, a local key value store, and a local database internally in a secure way.
Level 6: If you can’t watch Netflix on your browser it’s probably a non-starter for some users so better figure out a way to include DRM compatibility. But if you do it, the privacy minded will get really upset, so ideally you’d figure out a way to do it in some way that can be easily turned off or removed.
Level 7: alright, so implementing all of that was hard. But if you don’t implement it in such an insanely optimized fashion that you can win arbitrary script tests that are meant to strain modern CPUs, the audience most likely to use your browser (geeks) will immediately move to something else and say your browser sucks. Get optimizing.
