I don't think it's quite the same as bug 441422, since I can live without OS Integration (though it would be nice, it apparently would also be "an extreme amount of complexity to implement"). I would be happy if -P implied -no-remote. Alternately, a way to explicitly open the Profile Manager (e.g. from the Tools menu) to start a new instance of Firefox. That's apparently been a very long-standing feature request.
I don't think it's quite the same as bug 441422, since I can live without OS Integration (though it would be nice, it apparently would also be "an extreme amount of complexity to implement"). I would be happy if -P implied -no-remote. Alternately, a way to explicitly open the Profile Manager (e.g. from the Tools menu) to start a new instance of Firefox. That's apparently been a very long-standing feature request.