ExtPulse от Dan E

ExtPulse monitors all your installed Chrome and Firefox extensions and alerts you the moment one breaks, gets disabled, crashes, or changes permissions — before your users notice.

Free tier:
- Real-time extension health monitoring
- Badge and desktop notifications on status changes
- Zombie detection (pings unresponsive extensions)
- Version change alerts
- Quiet hours to suppress off-hours notifications
- Filter by specific extensions or monitor all

Pro tier ($19 one-time):
- Custom check interval (as fast as every 30 seconds)
- Full event history export (CSV and JSON)
- Priority email support

No subscription. One-time payment. License key entered in Options. Works on Chrome and Firefox.