[elldoubleyew]

Maintaining compatibility in web apps is a problem thats mostly been irradiated since MS finally dropped IE. In terms of architectural decisions you are going to end up very closely tied to Googles design decisions if you want to maintain full compatibility going forward.

Theres really no winning here, FF already has to follow in Chromes footsteps because of how dominant they are in the market. They have all the decision making power on "what the web supports".