Examine source code of Parrot API mocking Pro

{
  "manifest_version": 2,
  "name": "Parrot API mocking",
  "description": "Hassle-free mocking of xhr and fetch calls.",
  "version": "8.6.1",
  "author": "Ruud Landman",
  "background": {
    "scripts": [
      "background/js/background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": "images/parrot.png",
    "default_popup": "popup/popup.html"
  },
  "web_accessible_resources": [
    "images/parrot.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start",
      "js": [
        "generic/js/alert.js",
        "content/js/content-start.js"
      ],
      "css": [
        "generic/css/css-variables.css",
        "generic/css/alert.css"
      ]
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end",
      "js": [
        "content/js/webcomponents-bundle.js",
        "content/js/mock-data-manager.js",
        "content/js/network-viewer.js",
        "content/js/content-end.js"
      ],
      "css": [
        "generic/css/css-variables.css",
        "generic/css/alert.css"
      ]
    }
  ],
  "icons": {
    "128": "images/parrot.png"
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7176d51b-8a34-4417-bb2c-fbf22444d2da}"
    }
  }
}