Certainly a valid concern, but it's true with any software. I think enough people (techies especially) are using LibreWolf that a lack of updates would be visible quickly.

Two years is enough time for Firefox itself to cease to exist. Cross that bridge when you burn it

I've been using IronFox since it came out and I don't think it has been out for 2 years yet... are you thinking of Mull from which it was forked when DivestOS stop being maintained?

Also, I've been using Librewolf since its early days too, and their updates are always only 1 to 2 days behind an updated Firefox. I know cuz ai update daily on my Artix Linux machine and have both browsers. Whenever Firefox is updated its usually the same day or a day later that Librewolf is also updated to the same version number.

I get the concern, but honestly the Librewolf devs have proven themselves at keeping pace with the upstream for quite a few years now. Hopefully the Ironfox devs can do the same.

as I understand their build system is automatic. updates are not, but they have an update checker companion thing, and flathub too can manage that if you install from there