Service Worker Detector

Name: Service Worker Detector
Rating: 4.8571 (7 reviews)
Author: Thomas Steiner

This extension detects if a website registers a Service Worker by reading the navigator.serviceWorker.controller property. It also parses the Web App Manifest.

This add-on was removed from Firefox Add-ons Store on 2025-05-11

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Features & Capabilities

The Service Worker Detector Chrome extension enables users to identify if a website registers a Service Worker by inspecting the navigator.serviceWorker.controller property. It also parses the Web App Manifest associated with the site. This lightweight and efficient tool is perfect for developers and testers working on progressive web apps (PWAs) or those analyzing site capabilities related to offline availability and caching strategies. With a simple interface, it facilitates rapid detection and manifest analysis without needing to dive deep into developer tools.

User Growth & Download Statistics

Add-on Developer Tools Programming

By:

Daily users:

Rating:

Version:

2.4.0 Last updated: 2020-11-03

Version code:

5127280

Creation date:

2017-04-21

Risk:

Permissions:

activeTab

Content scripts matches:

<all_urls>

Size:

201.64KB

Email:

st*****@gmail.com

URLs:

Website

Source:

Firefox Add-ons Store

Data ingested on:

2025-05-11

Compare stats and ranking:

Other platforms

Service Worker Detector (v2.4.1)

520 3.40

(5)

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Thomas Steiner

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/service-worker-detector/

Email:

st*****@gmail.com

Website:

https://github.com/google/service-worker-detector/issues

User Reviews

by 远离*****, 2025-03-31

by 远离*****, 2025-03-01

by Bj*****, 2023-03-06

View all user reviews ›

Is Service Worker Detector Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

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

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Service Worker Detector may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.