Comment by allan_s

Yes sorry I meant firefox not for the way its sync , but in the way its a heavy client you install. As said for me most of my devices will be at some times during the week in the same nat so that no centralized server even short lived should be needed. And for personnal use, I only care if the device I have on me is the one with latest data especially as for most use case I'm the only one reading/ writing , so eventually consistency is not an issue