https://techcrunch.com/2019/04/22/facebook-makes-its-first-browser-api-contribution/

Facebook today announced that it has made its first major API contribution to Google’s Chrome browser. Together with Google, Facebook’s team created an API proposal to contribute code to the browser, which is a first for the company. The code, like so much of Facebook’s work on web tools and standards, focuses on making the user experience a bit smoother and faster. In this case, that means shortening the time between a click or keystroke and the browser reacting to that.

The first trial for this new system will launch with Chrome 74.