If there is PC (Linux) on the local network, and a web browser (FireFox, Chrome, etc) is running on the PC, and an extension (that I wrote) is installed on the browser, and on another computer on the same network, I want to send messages to the extension and get results back from the extension, how can I achieve this?
All the PC's are mine, and the extension that I am going to write will be used only by me, so I can use any permissions or set up the PC in however way needed.