I love WPT (I even have a bookmark comparing all of these browsers as well as Flow[0] that I check regularly).

But this is absolutely NOT how this site is meant to be used. For example, Ladybird jumped from about 30% to over 70% when it added a bunch of unicode logic. Secondly, these tests aren't all even officially agreed upon standards. Some are specific to Chrome features that are still in the draft stages for W3C. Many tests are written by the developers of the engines themselves. Chrome, having a larger team, will naturally contribute many more tests relevant to whatever feature they're prioritizing

[0] https://wpt.fyi/results/?label=master&product=chrome&product...