Examine source code of TCP States DevTools Panel

{
  "manifest_version": 2,
  "name": "TCP States DevTools Panel",
  "version": "1.0.0",
  "description": "Monitor and export TCP states for browser connections in a Firefox DevTools panel.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "downloads"
  ],
  "devtools_page": "devtools.html",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a6c834d7-e123-4088-be50-aa313005f48f}"
    }
  }
}