Firefox has the same number of "Unknown" capabilities as Chrome and Safari. These are items which aren't tracked in Can I Use or MDN, and I intend to resolve those ASAP. (I appreciate you calling me out on that.)

> This feels like a chrome ad

A significant number of things on this list are non-standard things that only Google have implemented for Chrome, that no other rendering engine has agreed to implement. Obviously this gives a huge artificial boost to Chrome.