# Firefox User.js | The Best Anti-Fingerprinting And Hardening For Firefox Browser

**URL:** <https://onehack.st/t/firefox-user-js-the-best-anti-fingerprinting-and-hardening-for-firefox-browser/268557>\
**Category:** Tools & Scripts\
**Tags:** tools, privacy, browsers\
**Created:** [December 14, 2023, 7:54pm UTC](https://onehack.st/t/firefox-user-js-the-best-anti-fingerprinting-and-hardening-for-firefox-browser/268557 "2023-12-14T19:54:50Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Prometheus](https://onehack.st/user_avatar/onehack.st/prometheus/32/34950_2.png) [@Prometheus](https://onehack.st/u/Prometheus)\
**Post date:** [December 14, 2023, 7:54pm UTC](https://onehack.st/t/firefox-user-js-the-best-anti-fingerprinting-and-hardening-for-firefox-browser/268557/1 "2023-12-14T19:54:51Z")

</div>

Great for your OPSEC. This custom user.js will give you the most privacy possible while using firefox on the desktop. It’s safe and updated frequently on github. Feel free to look through the source code and read the wiki before installing.

### 🟪 user.js

A `user.js` is a configuration file that can control Firefox settings - for a more technical breakdown and explanation, you can read more in the [wiki](https://github.com/arkenfox/user.js/wiki/2.1-User.js)

### 🟩 the arkenfox user.js

[![License: MIT](https://camo.githubusercontent.com/78f47a09877ba9d28da1887a93e5c3bc2efb309c1e910eb21135becd2998238a/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f4c6963656e73652d4d49542d79656c6c6f772e737667)](https://opensource.org/licenses/MIT)

The `arkenfox user.js` is a **template** which aims to provide as much privacy and enhanced security as possible, and to reduce tracking and fingerprinting as much as possible - while minimizing any loss of functionality and breakage (but it will happen).

Everyone, experts included, should at least read the [wiki](https://github.com/arkenfox/user.js/wiki), as it contains important information regarding a few `user.js` settings. There is also an [interactive current release](https://arkenfox.github.io/gui/), thanks to [icpantsparti2](https://github.com/icpantsparti2).

Note that we do _not_ recommend connecting over Tor on Firefox. Use the [Tor Browser](https://www.torproject.org/projects/torbrowser.html.en) if your [threat model](https://2019.www.torproject.org/about/torusers.html) calls for it, or for accessing hidden services.

Also be aware that the `arkenfox user.js` is made specifically for desktop Firefox. Using it as-is in other Gecko-based browsers can be counterproductive, especially in the Tor Browser.

### 🟧 sitemap

- [releases](https://github.com/arkenfox/user.js/releases)
- [changelogs](https://github.com/arkenfox/user.js/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3Achangelog)
- [wiki](https://github.com/arkenfox/user.js/wiki)
- [stickies](https://github.com/arkenfox/user.js/issues?q=is%3Aissue+is%3Aopen+label%3A%22sticky+topic%22)
- [diffs](https://github.com/arkenfox/user.js/issues?q=is%3Aissue+label%3Adiffs)
- [common questions and answers](https://github.com/arkenfox/user.js/issues?q=is%3Aissue+label%3Aanswered)

### 🟥 acknowledgments

Literally thousands of sources, references and suggestions. Many thanks, and much appreciated.

## GitHub:

> **[GitHub - arkenfox/user.js: Firefox privacy, security and anti-tracking: a...](https://github.com/arkenfox/user.js)**
>
> Firefox privacy, security and anti-tracking: a comprehensive user.js template for configuration and hardening