Quote from the website:
As of December 13, 2017, customers visiting FamilySearch.org will be asked to sign up for a free FamilySearch account or to sign in to their existing account to continue enjoying all the free extended benefits FamilySearch has to offer. Since its launch in 1999, FamilySearch has added millions of users, billions of historical records, and many new features such as family tree, reminders, mobile apps, digital books, and dynamic help. To accommodate the continued growth of this and future free services, FamilySearch must assure all its partners that its content is delivered in a secure and secure online environment. Customers who create a free account and sign up meet this need.
User login also allows FamilySearch to meet the continuing need for user authentication. This authentication can provide rich, personalized recognition, collaboration, and help experiences. Simply put, logged in visitors can access more searchable content and use more personalized services.
‘A large percentage of our current website visitors do not benefit from what FamilySearch offers because they do not know that they simply have to sign up with their free account,’ said Steve Rockwood, CEO of FamilySearch. ‘They basically arrive in the parking lot, but they do not come in for the main event,’ he said of website visitors who did not sign up.
FamilySearch is committed to protecting the privacy of its users and does not share personal account information with third parties without the consent of a user.
For more information about creating a free account, see Register to use FamilySearch.org.