I've written my own now, which just approximates the Chrome behavior. (I looked at Conex after you linked it, and it didn't quite do what I felt was right.) ht

I've written my own now, which just approximates the Chrome behavior. (I looked at Conex after you linked it, and it didn't quite do what I felt was right.) https://github.com/kemayo/firefox-sticky-containers https://github.com/kemayo/firefox-sticky-containers I'm currently seeing whether #webextensions on irc.mozilla.org feels like ripping it to shreds, but I'll put it up on AMO after that's done.