Examine source code of Google Search num=100

{
  "manifest_version": 2,
  "name": "Google Search num=100",
  "version": "1.0",
  "description": "Добавляет параметр num=100 к поисковым запросам Google",
  "permissions": [
    "webNavigation",
    "tabs",
    "*://www.google.com/*",
    "*://www.google.ru/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Google num=100"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{54ecfec0-a142-4058-9528-e3ab0af71a39}"
    }
  }
}