Look Up Dictionary by Using Right Click is a Firefox add-on designed to enhance the browsing experience by providing quick dictionary access. With a simple right-click on any word on a webpage, users can select 'Look up in dictionary' to send the chosen text to a compatible dictionary software that supports the dict URI scheme. This feature streamlines the process of looking up definitions without navigating away from the current webpage.

The add-on requires a bit of setup, especially for users on Windows and Linux, as it relies on a wrapper script to connect with external dictionary applications. Users must prepare the script before installation and may need programming skills for customization. After the initial setup, the addon allows seamless integration with dictionary software, making it particularly useful for students, writers, and anyone looking to enhance their vocabulary while browsing.