How about a chrome plugin for developers which somehow on a press of a button replaces the chrome rendered website with the firefox rendered one within chrome?

How about a chrome plugin for developers which somehow on a press of a button replaces the chrome rendered website with the firefox rendered one within chrome? Or like every second reload or something it uses firefox rendeder instead of chrome's. Or uses headless firefox and somehow in the background compares the current chrome website state with the firefox one. This could work for multiple browsers at the same time and would be a must have for web devs.