Yes, uBlock devs said that they fixed the problem
Whiplash (2014)
It would be nice to have them, it’s an additional attraction factor for users. It could be done using hybrid approach where one hash derived from user password is used to authenticate in Lemmy and retrieve chat list, second completing hash would decrypt them. Example: https://hacks.mozilla.org/2018/11/firefox-sync-privacy/
People at Fediverse care too much about the devs. 95% libs on Mastodon, 85% Reps on Soapbox/Pleroma, 70% commies on Lemmy, etc. Never gave a shit about it since nearly all federate with each other.