Examine source code of Pause on Scroll

{
  "manifest_version": 2,
  "name": "Pause on Scroll",
  "version": "1.0",
  "description": "Pause HTML5 videos when the page is scrolled.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{db205dff-56fb-44bd-9140-397fdecd7a73}"
    }
  }
}