# Block Service Workers

> Disallow to register Service Workers

Canonical page: [https://chrome-stats.com/d/block-service-workers](https://chrome-stats.com/d/block-service-workers)

## Overview

- **ID:** `block-service-workers`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Claudio Contin
- **Category:** web-development,privacy-security,other
- **Daily users:** 37
- **Rating:** 4.80 / 5 (5 ratings)
- **Version:** 0.3.7resigned1
- **Last updated:** 2024-04-26
- **First published:** 2018-09-03
- **Size:** 58 KB
- **Data as of:** 2026-09-15
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/block-service-workers/)

## Description

Block Service Workers is a Firefox add-on that disallows the registration of Service Workers. Service Workers are a type of web technology that allows websites to run scripts in the background, even if the website is closed or not actively being used. With this add-on, users can prevent websites from utilizing Service Workers, providing more control over their browsing experience.

## Rankings

- #18,565 — Overall
- #13 — service
- #22 — register
- #174 — work

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `notifications`

### Content script matches

- `*`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/block-service-workers)