Check FedCM request are getting captured in devtools msg.params: { accounts : [ [0] : { accountId : 1234 email : john_doe@idp.example givenName : John idpConfigUrl : https://127.0.0.1:8443/resources/fedcm/fedcm.json idpLoginUrl : https://127.0.0.1:8443/resources/fedcm/signin.html loginState : SignIn name : John Doe pictureUrl : https://127.0.0.1:8443/profile/123 } [1] : { accountId : 5678 email : aisha@idp.example givenName : Aisha idpConfigUrl : https://127.0.0.1:8443/resources/fedcm/fedcm.json idpLoginUrl : https://127.0.0.1:8443/resources/fedcm/signin.html loginState : SignUp name : Aisha Ahmad pictureUrl : https://127.0.0.1:8443/profile/567 privacyPolicyUrl : https://rp.example/privacy_policy.html termsOfServiceUrl : https://rp.example/terms_of_service.html } ] dialogId : dialogType : AccountChooser title : Sign in to devtools.test } token: 1234 urls loaded Url: https://127.0.0.1:8443/.well-known/web-identity, Status: 200::OK Url: https://127.0.0.1:8443/resources/fedcm/accounts.php, Status: 200::OK Url: https://127.0.0.1:8443/resources/fedcm/client_metadata.json?client_id=123, Status: 200::OK Url: https://127.0.0.1:8443/resources/fedcm/fedcm.json, Status: 200::OK Url: https://127.0.0.1:8443/resources/fedcm/token.php, Status: 200::OK Payload from requestWillBeSent: client_id=123&nonce=2&account_id=1234&disclosure_text_shown=false&is_auto_selected=false&mode=passive&fields=name,email,picture getRequestPostData did not capture POST data for https://127.0.0.1:8443/resources/fedcm/token.php urls failed Url: https://127.0.0.1:8443/profile/123, Status: net::ERR_HTTP_RESPONSE_CODE_FAILURE Url: https://127.0.0.1:8443/profile/567, Status: net::ERR_HTTP_RESPONSE_CODE_FAILURE