ImTranslator Text-to-Speech audio downloader

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "version": "0.1.1",
  "short_name": "__MSG_appShortName__",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://text-to-speech.imtranslator.net/sockets/tts.asp*",
        "https://text-to-speech.imtranslator.net/sockets/tts.asp*",
        "http://text-to-speech.imtranslator.com/sockets/tts.asp*",
        "https://text-to-speech.imtranslator.com/sockets/tts.asp*"
      ],
      "css": [
        "styles/contentscript.css"
      ],
      "js": [
        "scripts/contentscript.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "http://text-to-speech.imtranslator.net/TTS/loader-wav.asp*",
        "https://text-to-speech.imtranslator.net/TTS/loader-wav.asp*",
        "http://text-to-speech.imtranslator.com/TTS/loader-wav.asp*",
        "https://text-to-speech.imtranslator.com/TTS/loader-wav.asp*"
      ],
      "css": [
        "styles/player.css"
      ],
      "all_frames": true
    }
  ],
  "oauth2": {
    "client_id": "175749604304-56p0m94mb6d0dscumei241nba07d1rgd.apps.googleusercontent.com",
    "scopes": [
      "https://www.googleapis.com/auth/plus.login"
    ]
  },
  "permissions": [
    "http://text-to-speech.imtranslator.net/TTS/loader-wav.asp*",
    "https://text-to-speech.imtranslator.net/TTS/loader-wav.asp*",
    "http://text-to-speech.imtranslator.com/TTS/loader-wav.asp*",
    "https://text-to-speech.imtranslator.com/TTS/loader-wav.asp*",
    "downloads",
    "identity"
  ],
  "web_accessible_resources": [
    "images/buy-buttons-black.png"
  ]
}