Examine source code of YouTube Black Theme

{
  "manifest_version": 2,
  "name": "YTBlackTheme",
  "author": "Laurin Neff",
  "version": "1.1.2resigned1",
  "description": "Changes the YouTube Website to have a black theme. Disable this extension to get the original theme.",
  "icons": {
    "144": "icons/blackyt-144.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "css": [
        "blacktheme.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{eabbc845-4fb4-4084-81f2-10e3bd1f295f}"
    }
  }
}