Examine source code of Nordic goose

{
  "manifest_version": 2,
  "name": "Nordic goose",
  "version": "0.3.1",
  "description": "Browser startpage with nord colors and a dancing goose.",
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "tabs",
    "bookmarks",
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "startpage/startpage.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d900abf5-2a26-4edb-8bc1-87662c6c4270}"
    }
  }
}