Examine source code of Scrollbar Remover

{
  "manifest_version": 2,
  "name": "Scrollbar Remover",
  "version": "1.1",
  "author": "Tim Weißenfels",
  "permissions": [
    "activeTab",
    "menus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_title": "Remove scrollbar",
    "show_matches": [
      "<all_urls>"
    ],
    "default_icon": {
      "19": "Toggle.svg",
      "38": "Toggle.svg"
    }
  },
  "commands": {
    "_execute_page_action": {}
  }
}