Examine source code of Keyword Highlighter

{
  "manifest_version": 2,
  "name": "Keyword Highlighter",
  "version": "1.0",
  "description": "Highlight keywords on webpages.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "options_page": "options.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e6602c97-5650-4c6a-89ff-5a23ceb7890b}"
    }
  }
}