We have a complex matrix of layouts and styles an user can chose from and we need to test them across all browser to make sure any improvement doesn't mess with

We have a complex matrix of layouts and styles an user can chose from and we need to test them across all browser to make sure any improvement doesn't mess with others. It's way cheaper to launch a browser headless at all the resolution we need and grab screenshot to visually compare them at glance, instead of goin one by one at hand