Examine source code of Todo List

{
  "manifest_version": 2,
  "name": "Todo List",
  "version": "1.0",
  "description": "Simple todo list",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{773196e5-2536-4452-a673-3cf00b8ca304}"
    }
  }
}