Examine source code of YouTube Subtitle Reader

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "version": "0.1.7.16",
  "icons": {
    "128": "icon128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "settings.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "all_frames": false,
      "run_at": "document_end",
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background/defaults.js",
      "background/google-translate.js",
      "background/tts-engines.js",
      "background/speech.js",
      "background/document.js",
      "background/events.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "settings.html",
    "content.js",
    "injected.js"
  ],
  "options_ui": {
    "page": "settings.html",
    "browser_style": false
  },
  "developer": {
    "name": "conrad.rzuc@gmail.com",
    "url": "https://github.com/conradRz/"
  },
  "homepage_url": "https://github.com/conradRz/readOutLoudSubtitlesFirefoxExtension",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e40156f-8eda-46fe-9e33-28da4e540072}"
    }
  }
}