The mix.com browser extension is a facilitator for registered users of mix.com to interact with their account data. It requires an authenticated session with mix.com web servers. The data sent to the mix.com web servers by the mix.com browser extension is limited to the url of the currently opened tab. Other user data may be exchanged between the user and the mix.com web servers using ordinary web application methods, subject to the privacy policy at https://mix.com/privacy