Merge pull request #8165 from jmcanterafonseca/fix_ftu_fb_config

Bug 842249 - FTU is not checking properly if Facebook is enabled or not(cherry picked from commit 4e02825797123a2e3c93bb5c1eb7a38c7c947e8a)
(cherry picked from commit 9929b8bb8a8a323a0a845873b0318894f90b656b)