Interop 2022 is a benchmark, agreed on by representatives of three major browser implementations, and developed through a process of public nomination and review with input from supporters Apple, Bocoup, Google, Igalia, Microsoft, and Mozilla.

It focuses on 15 areas identified by developers as being particularly troublesome.

The goal of these multi-year interoperability efforts, in the form of Compat 2021, Interop 2022 and much more, is to fully acknowledge and address the pain points developers have experienced through for many years. And it's not a one-browser effort but rather a strong collaboration between all major browser vendors and friends for improving the web platform across the board.