Examine source code of Use Random Search Engine

{
  "name": "Use Random Search Engine",
  "description": "Type 'rs' plus a search term into the address bar to search with a random search engine.",
  "version": "2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "random-search-engine@fabwi",
      "strict_min_version": "63.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "dice-six-faces-three.svg",
    "96": "dice-six-faces-three.svg"
  },
  "omnibox": {
    "keyword": "rs"
  },
  "manifest_version": 2,
  "permissions": [
    "search",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "author": "Fabian Wilske"
}