This is a helpful starting place, thanks!

Any recs for a OpenWRT-supported router? The list is pretty deep

What kind of box are you using?

For sure, that makes sense. I was just curious if you had noticed any added functionality

Do you feel like it improves on evince in any way? I saw it a while back but it didn’t look too different imo

This is the first time I’ve heard of mTLS. Sounds interesting, any tutorial recs?

Just myself, but I would like to keep it synced between my phone and my laptop while also keeping a backup.

I use a similar set up. Librewolf on Linux and IronFox on Android. You could still use a Firefox account to sync, but I wouldn’t. I’ve heard there’s a way to host an older version of Firefox sync locally, but I haven’t looked into it.