Comment 4 for bug 1551236

Hi Alberto,

will test your (above) approach later on.

In the meantime, I tested to remove and add the Facebook account and how this changes the behaviour of Facebook apps.
Please note that I have 3 facebook apps installed and I tested on all 3:

I removed my FB account from system. All 3 applications required a logon while started.
Then I added by FB account, with these results:
1) Pre-installed FB app still ignores OS-level-defined FB account and prompts for logon
https://uappexplorer.com/app/com.ubuntu.developer.webapps.webapp-facebook
2) Second FB application still ignores OS-level-defined FB account and prompts for logon
https://uappexplorer.com/app/facebook.mreese
3) Third application uses OS-level-defined FB account and does NOT require a separate logon, works as expected:
https://uappexplorer.com/app/com.ubuntu.developer.majster-pl.facebook-app