Examine source code of Website Screenshot Tool

{
  "manifest_version": 2,
  "name": "Website Screenshot Tool",
  "version": "1.0",
  "description": "Website Screenshot Tool is a fun and useful utility. It helps users take a screenshot of a current web page and save it on their computer.",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/tool-logo.png"
    }
  },
  "icons": {
    "128": "images/tool-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6ac108d-8c7d-41ff-b562-4c352904c7d0}"
    }
  }
}