Messaging App Stealth Mode

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "3.0",
  "manifest_version": 2,
  "name": "Messaging App Stealth Mode",
  "description": "Stealth mode for a certain messaging app",
  "author": "Oryan Moshe",
  "permissions": [
    "activeTab",
    "*://web.whatsapp.com/*",
    "declarativeContent",
    "storage"
  ],
  "icons": {
    "48": "icons8-northern-lights-48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "page_action": {
    "default_icon": "icons8-northern-lights-48-mono.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://web.whatsapp.com/*"
      ],
      "css": [
        "stealthmode.css"
      ],
      "js": [
        "jquery-3.3.1.min.js"
      ]
    }
  ]
}