WhatsApp Web Dark Mode

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "WhatsApp Web Dark Mode",
  "version": "0.1",
  "manifest_version": 2,
  "description": "A simple extention to turn on dark mode of WhatsApp Web",
  "author": "Sashen Pasindu",
  "homepage_url": "https://sashen.me",
  "background": {
    "scripts": [
      "modernizr.min.js",
      "js/jquery-3.4.1.min.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js",
        "js/jquery-3.4.1.min.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "images/icon_16.png",
    "128": "images/icon_128.png"
  }
}