I had not used JabRef for a while. I’m happy to see it has moved to Github.
Currently I am a user of Mendeley and I have the following workflow. I have a folder within Mendeley (desktop) that I keep synced with the cloud (including PDFs). Then I read these PDFs from my Android device (with Mendeley app installed). I annotate these PDFs with Mendeley built-in viewer, and sync the annotations back and forth between the device and my PC.
Is it possible to reproduce this workflow (or something similar) with Jabref (myabe + other tools)?