Thanks for testing Firefox Beta!
This latest version includes the following fixes:
#13117 - Don't show add to collections button in private tabs tray
#11610 - Fire sign in event for other types of auth events
This also uplifts the fixes that were recently added to 79.0.2:
AC fixes:
mozilla-mobile/android-components#7536
mozilla-mobile/android-components#7893
mozilla-mobile/android-components#7896
mozilla-mobile/android-components#7782
mozilla-mobile/android-components#7917