Examine source code of Storage Saver

{
  "manifest_version": 2,
  "name": "Storage Saver",
  "version": "1.0",
  "description": "Save, import, and export local and session storage.",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60b53ab3-e1c5-4e55-b627-4593805f580f}"
    }
  }
}