It's an admittedly weaker point: If folks want to avoid snaps (as this blogger professes) but choose Ubuntu then their next best option is (the default browser on Ubuntu): Firefox.

I guess a more succinct way to put it is: I actively oppose chrome and really don't care if the snap haters are screwed by Canonical's approach to packaging it.

I agree with you about chrome, but your point only works if nothing other than chrome is dependent on snaps, which seems clearly not what Canonical is aiming for.

Especially since Firefox have an officially maintained Flatpak package which works beautifully, at least on my machine.

Is the snap version of FF maintained by Mozilla, by any chance?

I second that question. Currently Ubuntu only forces Chromium to be installed as snap, not Google Chrome.