Examine source code of Simple AutoScrol

{
  "manifest_version": 2,
  "name": "Simple AutoScroll",
  "version": "1.0",
  "description": "A simple extension to enable auto-scroll functionality on any webpage using keyboard shortcuts or middle mouse click.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "AutoScroll Control"
  },
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "popup.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{85e87532-3dfb-4d95-9430-7f57e5d8fcc8}"
    }
  }
}