We do not collect information where we can help it.
On services that allow you to log in we make use of session cookies. These are cookies that allows the server to remember which user you are while you use the site. If you selected to be remembered when logging in, these are stored in your browser between sessions. If you didn't, they are automatically removed when you close your browser.
If you have any questions, feel free to email us at email@example.com.