Native Text to Speech (TTS) is a subscription-based Firefox addon designed for enhancing productivity by enabling users to listen to text from web pages and PDF files. This tool operates seamlessly in the background, allowing users to navigate through different tabs while listening. It utilizes the installed voices on the user's PC, eliminating the need for an online connection, making it efficient for multitasking. Users can queue multiple speech utterances from various tabs, providing a flexible listening experience.

The addon features an options panel where users can enable or disable voices and adjust settings like rate, pitch, and volume. It supports multiple languages, with the option to install additional language packs. While primarily optimized for Windows, it is also available for macOS and Linux, although users may need to check their operating systems for compatible voices. Users are advised to avoid pressing pause just before the end of a text to prevent potential bugs.