Link Visitor is a Firefox add-on designed to enhance browsing by allowing users to mark links as visited or unvisited without actually accessing them. This functionality is particularly useful for managing browser history and organizing links. Users can add multiple links to their history and remove them as needed, streamlining their browsing experience. The add-on requires specific privacy settings in Firefox to function optimally, ensuring a seamless integration with the browser's existing features.

The extension offers various preferences, such as the ability to override the default color of visited links and customize bookmark settings. Users can manage links individually or in bulk with simple right-click commands. However, some features, like customizable shortcut keys, are limited due to Firefox's current support. Despite minor known issues, Link Visitor remains a practical tool for Firefox users looking to optimize their link management.