- This extension collects visited URLs and user search terms that contain '.xrd' which are then queried against the XRD.domains resolver data, and is required for the add-on to function.

- The extension stores the resolved domain mapping in a local storage cache (local to the user machine / device only) and is stored upon successful user query of a .xrd domain. This cache is then queried during navigation to ALL visited URLs to find a possible mapping to display relevant information about the domain mapping in the popover window.