Examine source code of Lookup - Website Profiler

{
  "name": "__MSG_name__",
  "description": "__MSG_description__",
  "version": "0.2.6",
  "manifest_version": 2,
  "default_locale": "en",
  "permissions": [
    "tabs",
    "storage",
    "clipboardWrite",
    "alarms",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "global.constants.js",
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "images/lookup.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "global.constants.js",
        "scripts/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "images/icon_16.png",
    "32": "images/icon_32.png",
    "120": "images/icon_120.png"
  },
  "web_accessible_resources": [
    "popup/popup.html",
    "popup/review.html",
    "popup/popup.css",
    "images/lookup.png",
    "images/cursor.png",
    "images/cursor-light.png",
    "images/close.svg",
    "popup/lookup_env.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{40cdf4f3-3fc8-49ae-b9b0-eaeb40756373}"
    }
  }
}