Hi Dexter007,
The issue I had is that I got Firefox as the default browser on my Android Blackberry Keyone. So I followed the FAQ steps, as such on my Android phone: Open Firefox -> Settings -> General ->Tab Queue -> Disable it.
Then I updated my Enpass Desktop to version 6.0.0 (230), and renamed the "Enpass" folder on my Good Drive to Enpass_old. Once that was done the desktop app updated my Google Drive with a new file. Next I uninstalled the Enpass from my Android phone and installed it again, during the installation I selected "Good Drive" as my default sync, the mobile Firefox came up and I authorized the connection. I think the main issue is that you need to have Enpass Desktop 6.0.0 (230) and the latest Android version, which appears to be 6.0.0.100.