# List of websites that break with Firefox hardening?

**URL:** https://discuss.privacyguides.net/t/list-of-websites-that-break-with-firefox-hardening/25564
**Category:** Questions
**Created:** 2025-03-07T15:28:39Z
**Posts:** 4

## Post 1 by @Anvil — 2025-03-07T15:28:39Z

Does anyone know of good lists of websites that break when used with hardened firefox like LibreWolf/Arkenfox and what settings to change to fix them? I found this list by Phoenix, but it seems incomplete

> **[Web Compat](https://codeberg.org/celenity/Phoenix/wiki/Web-Compat)**
>
> Phoenix is a suite of configurations & advanced modifications for Mozilla Firefox, designed to put the user first - with a focus on privacy, security, freedom, & usability.

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## Post 2 by @xe3 — 2025-03-07T17:49:51Z

> [@Anvil](#):
>
> Does anyone know of good lists of websites that break when used with hardened firefox like LibreWolf/Arkenfox and what settings to change to fix them? I found this list by Phoenix, but it seems incomplete

1. Twitter is broken with my personal configuration (Firefox configured via Arkenfox & uBO in medium mode). I could fix it (by whitelisting a few things, but I prefer to leave it broken, twitter is a cesspool, and I appreciate have a little extra friction/annoyance to discourage myself from using it)

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## Post 3 by @KevPham — 2025-03-07T18:32:00Z

If you’re in the job search, expect most video interviewing websites (i.e. hirevue) to break. Some of them won’t work with non-hardened firefox regardless

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## Post 4 by @Defiant — 2025-03-10T12:36:21Z

My current biggest problem is ClownFlare and the spyware that they serve every once in a while from their “[challenges.cloudflare.com](http://challenges.cloudflare.com)” domain. Many websites choose to be proxied behind them, so I do not have much of a choice when browsing the internet. My browser usually blocks their fingerprinting scripts for being potentially malicious, but that often causes websites to no longer function. I am sometimes forced to go scanning for domain IP history, so I can modify my DNS settings and have the domain point directly to the real website IP address to bypass the CF proxy. It sometimes works. I’ve already complained to a number of website admins, but I’m mostly met with deaf ears.