It appears that Waterfox is one of the few ways to use the legacy extensions that Firefox removed the support for and to use a browser that Mozilla doesn't have control over.
I'd maybe also look at GNU IceCat: https://en.wikipedia.org/wiki/GNU_IceCat
It's actually curious to see a discussion about a fork of Firefox, since a little bit ago i personally felt that there might just be a rise of more forks and attempts to abandon Mozilla due to their recent behaviour: https://news.ycombinator.com/item?id=28785896
I wouldn't recommend it, but that's just because I wouldn't recommend any web browser right now.
Well, Waterfox is owned by an advertising company.
It's incredible that an advertising company does better than a for-profit owned by a non-profit in this regard.
browser.urlbar.suggest.quicksuggest.sponsored
browser.urlbar.sponsoredTopSites
browser.urlbar.trimURLs
False.
It is possible that I'm so culturally eccentric that the obstruction of useful information fails to appeal to me.
They were already off for me, and I don't remember being asked about enabling them after an install...
Edit: just to add to this, my understanding is that Mozilla uses (abuses?) their trademark on Firefox to keep the distributions in line. If you distribute a version of Firefox that's been patched to remove anti-features, you can't call it Firefox.
Indeed, it would be rather surprising if they did, as I'm an Arch user as well and they have not disabled the sponsored new tab suggestions or the Pocket article recommendations. Hard to say what would be beyond the pale for the Arch maintainers.
From what I can tell from this thread, they are currently selectively enabling this for certain users. Maybe it just hasn't been enabled for you yet, or you're in a region (non-US) that doesn't get it enabled?
It isn't a patch to Firefox just configuration.
There really isn't a good web browser.
Firefox also has some telemetry which Waterfox cuts out.