# UserCSP

> User-defined Content Security Policy

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

## Overview

- **ID:** `usercsp`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** asannou
- **Category:** web-development,privacy-security,other
- **Daily users:** 7
- **Rating:** 2.33 / 5 (3 ratings)
- **Version:** 1.1resigned1
- **Last updated:** 2024-04-26
- **First published:** 2018-09-02
- **Size:** 9.10 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/usercsp/)
- **Website:** [https://github.com/asannou/usercsp](https://github.com/asannou/usercsp)

## Description

UserCSP is a Firefox add-on that enables users to create and customize their own Content Security Policy. With UserCSP, users have full control over the security settings for web content displayed in their browser.

## Rankings

- #38,025 — Overall
- #198 — policy
- #223 — define

## Permissions and access

### Permissions

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

## Safety

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

- [CSP Evaluator Content](https://chrome-stats.com/d/csp-evaluator-content) — 1 users
- [CSP Tester](https://chrome-stats.com/d/csp-tester) — 73 users
- [Content Security Policy (CSP) Generator](https://chrome-stats.com/d/csp-generator) — 579 users, 4.00 / 5
- [CSP Content Security Policy Generator](https://chrome-stats.com/d/content-security-policy-gen) — 252 users, 3.40 / 5
- [CSPTool](https://chrome-stats.com/d/csptool) — 1 users
- [CSP Checker](https://chrome-stats.com/d/csp-checker) — 17 users
- [CSP Evaluator ext](https://chrome-stats.com/d/csp-evaluator-ext) — 3 users
- [security.csp.enable:false](https://chrome-stats.com/d/security-csp-enable-false) — 1 users
- [Quick CSP - Whitelist Generator](https://chrome-stats.com/d/quick-csp-whitelist-generator) — 1 users
- [CSP Unblock](https://chrome-stats.com/d/csp-unblock) — 95 users, 3.50 / 5
- [CSP for Me](https://chrome-stats.com/d/csp-for-me) — 39 users, 4.75 / 5
- [CSP Evaluator](https://chrome-stats.com/d/csp-evaluator) — 369 users, 4.00 / 5

---

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