And browsers need to add RSS/Atom feed autodiscovery and display (as the little feed icon in the URL bar) back to the browser. It was removed in 2018 by Firefox for no reason at all.
Anyhow - Pale Moon retains both features and for the weirdos who hate RSS for some reason, there's an about:config toggle to hide the feed detection icon altogether.
It was buggy and in a format that was almost useless.
If you complained about losing the RSS reader on the Mozilla to Firefox transition, then yeah, that was a loss. But the FF one was never an option.