Examine source code of Scroll Up to Top

{
  "description": "Click on the up arrow icon to scroll to top, Doesn't work for Firefox internal pages & AMO page",
  "manifest_version": 2,
  "name": "Scroll to Top",
  "version": "0.0.0.2resigned1",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "24": "icons/24.png",
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Scroll To Top",
    "default_icon": "icons/24.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ae6c37a0-a1f6-417c-ad9a-e7b116cba30e}"
    }
  }
}