Examine source code of Adapt Inspector

{
  "manifest_version": 2,
  "name": "Adapt Inspector",
  "version": "0.2.0",
  "description": "Inspect details of elements in Adapt courses",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "css": [
        "inspector.css"
      ],
      "js": [
        "lodash.custom.min.js",
        "jquery.min.js",
        "inspector.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "lodash.custom.min.js",
    "postadaptdata.js"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "permissions": [
    "storage"
  ]
}