Whatsapp Web Dark Mode

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "version": "0.0.1",
  "name": "Whatsapp Web Dark Mode",
  "description": "Extension to enable WhatsApp Web in dark mode.",
  "author": {
    "name": "Rafael Laurindo",
    "email": "[email protected]"
  },
  "icons": {
    "72": "images/icons/icon-72x72.png",
    "96": "images/icons/icon-96x96.png",
    "128": "images/icons/icon-128x128.png",
    "144": "images/icons/icon-144x144.png",
    "152": "images/icons/icon-152x152.png",
    "384": "images/icons/icon-384x384.png",
    "512": "images/icons/icon-512x512.png"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "persistent": true
  },
  "page_action": {
    "default_icon": "images/icons/icon-512x512.png",
    "default_title": "Whatsapp Web Dark Mode",
    "default_popup": "src/page_action/page_action.html"
  },
  "permissions": [
    "tabs",
    "storage",
    "https://web.whatsapp.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://web.whatsapp.com/*"
      ],
      "js": [
        "src/inject.js"
      ]
    }
  ]
}