Cookies and local storage
Last updated: 17 October 2026
Essential browser storage makes sign-in, preferences and personal progress work.
Essential storage
Session cookies identify your signed-in account. A preview cookie records access to the preview. Local and session storage remember your tools, unfinished check-in and cookie preference.
You can clear these in your browser. Doing so may sign you out and remove guest progress that has not been saved to an account.
Optional storage
Optional analytics and advertising are not currently enabled. The preference controls let you accept or reject optional storage equally. If optional tools are introduced, their purpose and providers will be disclosed before activation.