This is the way.

Zen’s UI is great, and it has better defaults for privacy than Firefox does, as well as having its own mods repository on top of all the standard Firefox webextensions. (Try “better find bar”, “floating history” and “floating status bar” if you haven’t already, they make the last few bits of the UI look consistent)

Ooh, that is neat! I’ve been using Lemmy for months and didn’t know this was a thing. You’re my first tracked upvote now :)