Examine source code of Bookmark Navigator

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "bookmark-navigator@chobit.org",
      "strict_min_version": "78.0"
    }
  },
  "name": "Bookmark Navigator",
  "version": "0.1",
  "description": "Generate navigation page from Chrome bookmarks",
  "permissions": [
    "storage",
    "bookmarks",
    "tabs",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    "navigation.html",
    "styles.css",
    "*.js",
    "i18n/*.js"
  ]
}