I'm not sure what you mean by justification. I think I simply lay out some context and a set of conflicting perspectives. That said, if you don't want Chrome a

I'm not sure what you mean by justification. I think I simply lay out some context and a set of conflicting perspectives. That said, if you don't want Chrome and Firefox to be content aware, then you should argue that safe browsing should be eliminated from Firefox and Chrome. That is a self consistent position, but it may not be consistent with e.g. avoiding dramatic growth in botnets, ransomware, organized crime etc.