Hello everybody, I wanted to upgrade my Firefox Sync account from the old to the new version. Unfortunately the login page does not load on my laptop. On my Android devices everything is working fine, so I could already set up the new account from there, I just can't login to my new sync account on my laptop. I am running Firefox 33.1 on Windows 8.1 Pro 64bit. The about:accounts landing page loads as normal, but clicking on the button to log in does not load the login form, the white box just stays empty. I asked my dear friend Google who gave me some answers (seems to be a common problem...), but none of them helped me. The debugging console displays the error "SecurityError: The operation is insecure" directly after loading about:accounts?action=signin. Opening https://accounts.firefox.com/signin and https://accounts.firefox.com/signup also results in the same error and an empty white box. https://accounts.firefox.com/legal/privacy works as normal though. I did not find a solution to work around that SecurityError up to now.