Update README.md

README.md

@@ -120,6 +120,8 @@ You can install the latest version [manually](https://github.com/gorhill/uBlock/
 
 It is expected that uBlock Origin is compatible with any Chromium-based browsers.
 
+**Important:** Chromium-based browsers do not relay [websocket connections](https://en.wikipedia.org/wiki/WebSocket) to the extension API. This means websites can use websocket connections to bypass uBO (or any other blocker). This can be remediated by installing uBO's companion extension [uBO-WebSocket](https://github.com/gorhill/uBO-WebSocket).
+
 #### Firefox / Firefox for Android
 
 [Firefox Add-ons web site](https://addons.mozilla.org/addon/ublock-origin/). There is also a development version if you want to test uBlock Origin with the latest changes: see [_uBlock Origin Version History_](https://addons.mozilla.org/addon/ublock-origin/versions/beta)