Examine source code of Help analyzer

{
  "manifest_version": 2,
  "name": "Help analyzer",
  "version": "1.0",
  "description": "analyze the page.",
  "permissions": [
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{077de017-1ada-4d5a-8d49-53bda43d7d2d}"
    }
  }
}