Link Control is a Firefox extension aimed at improving the visibility of visited links for web users. It offers a customizable experience by allowing users to select from a variety of predefined colors or create their own custom color for visited links. This feature is particularly beneficial for individuals who struggle with color differentiation, such as those who are color-blind or work in low-light environments.

In addition to color customization, Link Control includes a blocklist feature that prevents the extension from running on specific websites, as well as an allowlist that enables it on selected sites. This flexibility ensures that users can tailor their browsing experience according to their needs, making it a valuable tool for enhancing web navigation.