Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

Is the browser extension ‘plug-in’ needed?

The browser extension 'plug-in' is required for participation in this study. It will only collect data on the groceries you purchase on the supermarket's website and will not gather any other data from the supermarket's website or any other sites.