Google's OpenID implementation works where Stack Exchange's doesn't ('Detected an attempt to send an assertion...')
125108
Unable to link OpenID on Stack Overflow with SourceForge
14340
Support for OpenID ended on July 25, 2018
88786
My OpenID provider is shutting down; how do I change my Stack Exchange login?
151022
Signing out of Stack Exchange does not sign me out of my email provider
116448
SignUp throws error in StackExchange.com for the non logged-in user
96801
OpenID Connect - adding custom attributes (claims) to id token
32951
Authenticate to Stack Exchange using GitHub
113554
Does Google special-case for Stack Overflow?
80977
Cannot log into Area 51 with OpenID
9521
Why is Google using a (new) 2 step Gmail sign in process?
25280
Two factor authentication for Stack Exchange
126805
Don't we have single sign-on for all Stack Exchange sites?
134463
Why is my StackExchange OpenID so hard to find?
55093
How can I add a Stack Exchange login to my preexisting account?
71183
Why does Stack Exchange ask for a reload on successful automatic login?
134758
How can I verify a Google authentication API access token?
24665
Unable to log in with your OpenID provider: Message signature was incorrect on Area51 only