This paper presents an improvement of our previous work on collaborative inference-based ontology alignment in P2P networks. This prototype uses a P2P network simulator and can pop nodes out of the simulator and run them in a JavaScript node inside a Web browser. Such nodes have been implemented to fulfill locally various P2P requests among which semantic matching of concepts, using the JavaScript OWLReasoner inference engine. They can run in any WebSocket-enabled browser, including on mobile devices, and can be used for testing or demonstration purposes.