Looks like it will take some time to figure it out, but the developer ljdawson is looking into Lemmy support for sync.
This app is so smooth, and caching posts and comments for offline use while on the plane or in low reception areas is a clutch feature for me.
How mate? I was using Firefox as well but the web interface has just so many bugs and it was so slow. I switched to Jerboa. The bugs are very minor and experience is a lot smoother