@jeffalo Can't sign in on the beta. It just re-directs to the homepage and doesn't want to log in.
I don't know how I would test that, but they seem to work on websites that I theorize use cookies. The websites like Scratch, Google, and Bing store cookies for things like search history and logins? If so, cookies aren't disabled, but I've been having the same problem on github as well
what browser are you using? also i found this test: https://www.whatismybrowser.com/detect/are-cookies-enabled i don’t know if its any good, but it should show “Yes” if cookies are enabled