Hello, I'd like to create a Firefox add-on that communicates with another process on the local computer. I've found the documentation about the WebExtension API and have already created a few add-ons, also for Thunderbird. But I couldn't find information about the IPC mechanisms in the documentation or the rest of the web. How does it work, where is it explained? I can handle sockets and named pipes (Windows) on the desktop development side, just need the browser side.