Twitch Lurk Muter by Matrixite

Twitch Lurk Muter is a simple Firefox add-on for Twitch viewers who use the !lurk command.

Whenever you send !lurk in a Twitch channel's chat, the add-on automatically mutes the Twitch tab for you. It works whether you send the command by pressing Enter or clicking the Send button.

Perfect for when you want to support a streamer by lurking while getting on with something else.

Features:

Automatically mutes the Twitch tab after sending !lurk
Only affects the Twitch tab where the command was sent
Simple and lightweight
No setup required
Does not collect or transmit any personal data