also here: https://www.reddit.com/r/firefox/comments/1qs62en/update_147_has_destroyed_most_of_my_ff_profiles/ https://www.reddit.com/r/firefox/comments/1qs62en

also here: https://www.reddit.com/r/firefox/comments/1qs62en/update_147_has_destroyed_most_of_my_ff_profiles/ https://www.reddit.com/r/firefox/comments/1qs62en/update_147... this happened to me as well, got logged out from many websites.