Use on another device
This URL lets another browser or device use the account you are using now.
What this URL hands over
The device that opens this URL becomes the same user as you. Favorites and private images carry over as they are.
Do not give it to anyone. Whoever has it can act as you.
This device keeps working after you hand it over. It is not a move — both devices are the same user.
Not issued yet
The secret URL is created only when you press the button. Until then there is no way in to your account.