Highlighter is an easy and lightweight open-source tool available on Chrome. It falls under the category of Browsers and specifically in the subcategory of Add-ons & Tools. The program allows users to highlight text on web pages for the current session, providing a convenient way to mark important information.

One key feature of Highlighter is its simplicity and efficiency in highlighting content on web pages. Users can easily select and mark text without the need for complex settings or configurations. However, it's important to note that the tool does not retain highlighted text after page refreshes, making it ideal for temporary annotations.