Yes, Chrome uses 1 process per domain. So I'm still not sure what would happen if Firefox is configured to use 4 content processes and 20 unique domain tabs are

Yes, Chrome uses 1 process per domain. So I'm still not sure what would happen if Firefox is configured to use 4 content processes and 20 unique domain tabs are opened. Would the domains be distributed to these content processes? And what happens if 1 content process crashes? Would it also bring down all of the domains associated to it?