Build: BuddyBuild #2396 DeviceL: iPad Air 2 iOS: 10.3.1 Steps to reproduce: 1. Log in to FxA on desktop and device 2. Go to History 3. Tap on Sync devices (Desktop is displayed in the list) 4. Go to Menu -> Settings 5. Tap Sync 6. Tap Home button to background Firefox 7. Restore Firefox Actual results: - The list of sync devices will not be displayed. See a video of the issue: - https://www.youtube.com/watch?v=yYPtG_gfPDU Note: - On mobile, I also managed to reproduce this issue by backgrounding Firefox and restoring a few times. See a video here: https://www.youtube.com/watch?v=Hr0q2cY9_x4
This is quite possibly a DB-backgrounding race; I've seen this myself (and commented on this) before.