Examine source code of YouTube Speed x3 b8q

{
  "manifest_version": 2,
  "name": "YouTube Speed Controller",
  "version": "1.0",
  "description": "Set YouTube video playback speed.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "96": "icon.png"
    }
  },
  "icons": {
    "96": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b810b28f-54eb-46cc-a636-b4217654c7d6}"
    }
  }
}