Service Worker Detector

This extension detects if a website registers a Service Worker by reading the navigator.serviceWorker.controller property. It also parses the Web App Manifest.
What is Service Worker Detector?
Service Worker Detector is a Firefox add-on that detects if a website registers a Service Worker by reading the navigator.serviceWorker.controller property. It also parses the Web App Manifest.

Add-on stats

Users: 148 ▼ -1
Rating: 4.86 (7)
Version: 2.4.0 (Last updated: 2020-11-03)
Creation date: 2017-04-21
Weekly download count: 4
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
  • activeTab
Size: 206.47K
URLs: Website

Other platforms

Service Worker Detector (v2.4.1)
3.40 (5) 1,000
Not available on Edge
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User reviews

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Add-on safety

Risk impact

Service Worker Detector requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

Service Worker Detector has earned a fairly good reputation and likely can be trusted.

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