A lightweight, secure, and premium browser extension designed to automatically mute WhatsApp Web sounds during user-configured time ranges (configured per weekday or for every day), or instantly via a manual override toggle.

• 🕒 Smart Scheduler: Configure time ranges to automatically silence incoming notification sounds.
• 🌙 Midnight-Spanning Support: Robust calculations to handle mute schedules crossing over midnight (e.g., 22:00 to 08:00 next day).
• 📅 Flexible Cycles: Switch between Every Day mode (one range for all days) or Custom Days mode (independent toggles and ranges for each day of the week).
• ⚡ Instant Mute: Force-mute all sounds immediately via a manual override switch in the popup.
• 🎨 Premium Dark UI: A beautiful user interface aligned with WhatsApp Web's native dark mode, complete with:
  • Glassmorphic panels with subtle borders.
  • Sliding segmented controls (Every Day vs Custom Days).
  • Collapsible weekday grids with smooth animations.
  • Dynamic status badge with a live pulsing indicator (Green for active, Red for muted).
• 🔊 Double Muting Engine:
  • Native Tab Muting: Silences standard browser tabs natively.
  • Page-Level Interceptor: Silences sound elements directly inside the webpage, fully supporting isolated panels like the Opera GX Sidebar Panel.
• 🔒 Privacy First: Runs 100% locally. Zero telemetry, zero network tracking, and zero data collection.

1. Download or clone this repository to your computer.
2. Open your browser and navigate to the extensions management page:
   • Chrome: chrome://extensions/
   • Opera / Opera GX: opera://extensions/
   • Edge: edge://extensions/
3. Enable Developer mode (usually a toggle switch on the top-right of the page).
4. Click the Load unpacked button (top-left).
5. Select the src directory located inside the extension folder (STFU-Whatsapp/src).
   • Note: Ensure you select the src folder, not the root project folder, as the manifest.json lies inside it.

1. Service Worker (background.js): Runs in the background and queries active tabs matching web.whatsapp.com. If a tab is open, it sets the tab's muted state using browser extension APIs. It also displays a "MUTE" badge and changes the extension icon dynamically.
2. Main World Scripts (contentScriptMain.js): Injected directly into the WhatsApp Web page context. It overrides Audio, document.createElement('audio'), and HTMLAudioElement.prototype.play to programmatically set the volume of notification sound elements to 0 and mute them in real-time. This ensures sidebar panels in Opera/Opera GX get muted even if the browser does not expose them to the tab APIs.

All settings are synchronized across your browser profile using chrome.storage.sync:

{
  "enabled": true,
  "mode": "everyday",
  "everyday": {
    "enabled": true,
    "start": "22:00",
    "end": "08:00"
  },
  "custom": {
    "monday": { "enabled": true, "start": "22:00", "end": "08:00" },
    "tuesday": { "enabled": true, "start": "22:00", "end": "08:00" },
    "wednesday": { "enabled": true, "start": "22:00", "end": "08:00" },
    ...
  },
  "manualMute": false
}

Developed & Redesigned by Fellipe Orsini.

Licensed under the MIT License. See LICENSE for details.

Disclaimer: WhatsApp is a trademark of WhatsApp Inc., registered in the U.S. and other countries. This extension is an independent project developed by Fellipe Orsini and has no relationship to WhatsApp or WhatsApp Inc.