# CSPBlocker

> Block certain web features to improve security, privacy and performance.

Canonical page: [https://chrome-stats.com/d/cspblocker](https://chrome-stats.com/d/cspblocker)

## Overview

- **ID:** `cspblocker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Jeurissen Apps
- **Category:** privacy-security
- **Daily users:** 27
- **Rating:** 4.00 / 5 (2 ratings)
- **Version:** 0.0.5
- **Last updated:** 2023-10-18
- **First published:** 2020-05-26
- **Size:** 12 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cspblocker/)
- **Website:** [https://apps.jeurissen.co/contact](https://apps.jeurissen.co/contact)

## Description

CSPBlocker is a powerful Chrome extension designed to give you control over your browsing experience by blocking unnecessary and potentially risky web features. It enhances security, privacy, and performance by preventing websites from loading custom web fonts, Java and Flash objects, reporting APIs, and workers such as service workers. Using content security policies, CSPBlocker effectively stops unwanted content that might slow down your browser or compromise your data.

Currently in active development, CSPBlocker promises to offer users granular control over which features to block and which sites can have specific exceptions. This ensures a safer, cleaner, and more customizable browsing experience without sacrificing functionality where it’s needed.

## Rankings

- #21,281 — Overall

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `storage`
- `<all_urls>`

## Safety

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

### Analysis details

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

## Similar extensions and apps

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- [Block Sites For Work](https://chrome-stats.com/d/block-sites-for-work) — 1 users

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