Yes, you can do that. But if you want it to be sustainable, you can't use that kind of line to convince people at large. And note that until Firefox 57, Firefox was not "marginally" inferior, it was substantially inferior in a number of metrics. They have improved since then, but it took them a very long time - you can't expect users to wait forever for you.
If we can't expect educated, tech-savvy users on HN to take the long view and support Mozilla, then I guess you're saying the game is already lost.
We might as well just make our peace that the age of an open internet and general-purpose computing is coming to an end. In future, we'll enjoy AOL 2.0 access on our Google Home Terminal Appliances.