WebSocket Tab Muter is a free Chrome add-on developed by rosuav. This add-on allows users to mute and unmute all tabs in Chrome with just a signal from a websocket or a hotkey. It falls under the category of Browsers and the subcategory of Add-ons & Tools.

One of the main features of WebSocket Tab Muter is its ability to integrate with a CS:GO Game State Integration service. This integration allows users to control Chrome audio based on their in-game status. Additionally, the add-on can be used independently to conveniently mute/unmute individual tabs or quickly silence all of Chrome.

In addition to its tab muting capabilities, WebSocket Tab Muter also includes a "close other tabs" feature. This feature allows users to set a hotkey that will close all tabs in the current window except for the active tab.

Overall, WebSocket Tab Muter is a useful Chrome add-on that provides convenient ways to control audio and manage tabs in Chrome.