Examine source code of Fishexpo Native Message

{
  "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDcBHwzDvyBQ6bDppkIs9MP4ksKqCMyXQ/A52JivHZKh4YO/9vJsT3oaYhSpDCE9RPocOEQvwsHsFReW2nUEc6OLLyoCFFxIb7KkLGsmfakkut/fFdNJYh0xOTbSN8YvLWcqph09XAY2Y/f0AL7vfO1cuCqtkMt8hFrBGWxDdf9CQIDAQAB",
  "name": "Fishexpo Native Message",
  "version": "2.1.0",
  "manifest_version": 2,
  "description": "Send a quick message to a native application.",
  "app": {
    "launch": {
      "local_path": "main.html"
    }
  },
  "icons": {
    "128": "128.png"
  },
  "permissions": [
    "nativeMessaging"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7348167-8a72-41a4-ba49-fd781679be46}"
    }
  }
}