Examine source code of Wishful Shopping

{
  "manifest_version": 2,
  "name": "Wishful Shopping",
  "version": "2.0.4",
  "description": "Bookmark page metadata and manage them in Pouchdb",
  "icons": {
    "128": "public/icon-128.png"
  },
  "web_accessible_resources": [
    "public/*",
    "assets/*"
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{79781150-38ba-41f4-85da-7b489c97b05a}"
    }
  },
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_popup": "popup/index.html",
    "default_icon": "public/icon-34.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "<all_urls>"
      ],
      "js": [
        "content/index.js"
      ],
      "css": [],
      "run_at": "document_start"
    }
  ]
}