YouTube Secret Dark Mode

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "YouTube Secret Dark Mode",
  "description": "Enable YouTube's secret dark mode",
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "author": "Steven Cohn",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "img/icon19.png",
    "default_title": "YouTube Secret Dark Mode"
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.youtube.com/*",
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "cookies",
    "notifications",
    "tabs",
    "http://www.youtube.com/*",
    "https://www.youtube.com/*"
  ],
  "version": "1.1",
  "web_accessible_resources": [
    "img/icon48.png"
  ]
}