You should look at the native messaging API, it does what you need for bi-ditectional communication between extension and local app. https://developer.mozilla.

You should look at the native messaging API, it does what you need for bi-ditectional communication between extension and local app. https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Native_messaging https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web...