Diccionario RAE en bocadillo is a subscription-based extension for Firefox that enhances the user experience while searching for definitions from the official Spanish dictionary, DLE. Users can easily access definitions from any webpage or PDF document using multiple search methods, including context menus and keyboard shortcuts. The extension simplifies the DLE interface and automatically redirects obsolete links to their correct pages, ensuring users have access to up-to-date information.

The extension offers customizable options for displaying definitions, allowing users to choose between a pop-up balloon or a new window for results. It supports various search methods, making it versatile for different user preferences. Additionally, users can access definitions from forms and documents on their computer. While it is not an official RAE extension, it provides reliable and current definitions directly sourced from the DLE website.