YouTube to MP4 Downloader

manifest.json

{
  "name": "YouTube to MP4 Downloader",
  "version": "1.1.4resigned1",
  "manifest_version": 2,
  "description": "Free online YouTube video downloader, download online video from YouTube for free just with one click, fastly and easily!.",
  "icons": {
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "css": [
        "mp3-download.css"
      ],
      "js": [
        "mp3-download.js"
      ]
    }
  ],
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7812d563-e8e1-48ba-982d-e4245bb78bfb}"
    }
  }
}