Examine source code of Page Screenshot

{
  "manifest_version": 2,
  "name": "Page Screenshot",
  "version": "1.0",
  "description": "Chụp ảnh toàn bộ trang web dễ dàng.",
  "permissions": [
    "activeTab",
    "downloads"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Page Screenshot"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{07487714-f3d2-47be-b288-24434fc56522}"
    }
  }
}