This is literally how all standards in browsers are being initially created. Someone has an idea, implements it eventually in a browser, thinks it´s so good, th

This is literally how all standards in browsers are being initially created. Someone has an idea, implements it eventually in a browser, thinks it´s so good, they want other browsers to support it too so they make a proposal. If others like it, they´ll support it and try to find faults. Eventually it gets either rejected, or approved and others follow suit (most of the times). Although, some browser teams, like Google Chrome, has apparently the ability of just shoving Google people in the standards process so they can fast-track stuff. But in the end, it's _supposed_ to work in the fashion where one browser starts implementing something, then others.