Firefox Bookmarks on Android

Does EverSync work in the same way on the mobile Android Firefox browser in the same way as the Windows Desktop Firefox browser?

E.g In Windows, if I go to Firefox > Addons > EverSync > Options, I see the 4 tabs (Account, SpeedDail, BookMarks, Backups), and can select BookMarks, then the sync option I want (Merge, Upload, Download) - and it works perfectly.

In Android, if i go to Firefox > Add-ons > EverSync, I see the 4 tabs (Account, SpeedDail, BookMarks, Backups), and can select BookMarks, but it just shows as 'Initializing 0/0, with a spinning wheel and nothing happens.

How can i get EverSync to work in Firexfox in Android in the same way as it does in Windows?