[jrm4]

The nightmare scenario which we may be hitting? Firefox (which I've always loved and used) may be institutionally so used to surviving how it can by compromising that it loses its way?

I wasn't that much concerned with it until recently. I got into the idea of the whole "website as app," thing (specifically, client-side you turn a website into a self-contained app, with or without the "sites" permission) -- and to find that Firefox had dropped this is disappointing because it feels well within Firefox's mission.

FWIW, presently I'm solving this through GNOME's Epiphany.

[Tijdreiziger]

Yes, this is a really unfortunate missing piece of functionality for Firefox. I’m currently solving this through Microsoft Edge, but it’s pretty janky (external links open in Edge, so I need to copy and paste them into Firefox).