To link your Ubisoft account to your Facebook account, please follow the steps below:
1. Open the Ubisoft Acount Website and click on 'Sign In'.
2. Scroll over the 'My Uplay' button at the top/right of the screen and choose 'My Account'
3. Select 'Edit Profile' and enter the password if prompted.
4. On the 'Edit Account' page click on the Facebook button beside 'External Platforms':
5. You will then need to accept the permissions request by clicking 'Allow'.
Your Ubisoft account is now linked to your Facebook profile.