This is just a minor nuisance for me, but if possible/ not too difficult, it would be nice if it were possible for the updated threads notification not to overlay the existing list of unread threads.
https://screenshotscdn.firefoxusercontent.com/images/52c7f4e5-4b66-47fd-aabe-2ce6b2c9d3fd.png
Usually the top most thread title gets covered completely and the second from top partially. This screenshot is from firefox 58.0.1 on Debian/ unstable (amd64), but I do see this behaviour with chrome on android 6 and 7 as well.