Intended operation: Bungie.net uses a session cookie to keep you signed in. Your session lasts for 60 (I think) minutes. It is renewed everytime you refresh the site. However, every 24 hours or if you close your web browser all the way down, you have to sign in again. Because we use external authentication systems, we can't just assume you still own the account you're using, and we've found that silent reauth generally doesn't work very well (it can lead to infinite refresh loops). The best you can do is to click the "remember me" button in your chosen login method's sign-in screen. This will allow you to skip typing stuff in, but you will have to still manually initiate the process when your session expires. We're unlikely to change this policy given the obvious security ramifications.