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WebSocket monitor is an extension to Firefox developer tools that can be used to monitor WebSocket connections in Firefox. It allows inspecting all data sent and received.

It's been a while since we published first version of our add-on for inspecting WebSocket traffic and it's good time to summarize all new features and show how it's integrated with Firefox Developer tools.

Download signed version of this add-on from AMO. The source code with further documentation is available on github.

WebSocket Monitor can be used to track any WS connection, but following protocols have an extra support: Socket.IO, SockJS, Plain JSON, WAMP, MQTT.


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