Certain browser extensions and their default settings can block a user's alternative authentication options configured to display on a third-party registration and profile management page. Review what browser a user currently employs and, if necessary, disable and fine-tune the extension settings of the browser.
Consider the following example. You have enabled third-party identity providers (IdP) to provide users with an alternative authentication option. Because you have enabled profile management, users can connect and disconnect their accounts with the third-party identity providers on the profile management page. However, some users are reporting that they do not see any such options on the sign-on page and the profile management page. The following screen captures illustrate what they see.
Browser extensions, particularly those designed to block ads or social network components, might block the user interface elements representing the third-party identity providers you enabled.