Examine source code of YouTube Dark Theme

{
  "name": "YouTube Dark Theme",
  "description": "__MSG_description__",
  "default_locale": "en",
  "version": "0.4.1",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "cookies",
    "alarms",
    "idle",
    "*://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "/v2/chrome.action.js",
      "/v2/chrome.runtime.js",
      "worker.js"
    ]
  },
  "homepage_url": "https://add0n.com/dark-theme.html?from=youtube",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "data/inject.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "data/options/index.html"
  },
  "browser_action": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "{e79cd175-8813-4cd2-a442-cbba163096b7}"
    }
  }
}