[Guide] Automatically install extensions and configure new (dispvm) hardened Firefox profiles with arkenfox user.js and policies

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Relevant point for this topic and for those who don’t want to be on the watch list for using Linux:

Antidetect‑appVM with FOSS Antidetect Browsers. Windows fingerprint. Random fingerprint in dvm

Change your browser fingerprint and make Firefox and Ungoogled‑Chromium appear as Google Chrome and Microsoft Edge, and make Linux look like Windows. Create disposable browsers with unique fingerprints (OS (Windows, Mac), CPU, GPU, timezone …etc) in DispVM! [Screenshot3] This guide is intended for regular users. Experienced users can improve this guide. I used these two antidetect-browsers based on Firefox and Ungoogled-Chromium: Download the AppImage from the releases Release Donut Brows…

Also in case of a web browsing qube restricted to a list of websites:

URL filtering HTTPS proxy

Introduction This guide is for users who want to let a qube access some specific websites, but not the entire Internet. It’s especially useful when using the Qubes firewall isn’t enough — for example, when websites change their IPs often, making domain-based rules unreliable. This guide assumes you know what an HTTP(S) proxy is, and that you’re comfortable using the terminal to run commands or edit files. The setup will create a sys-proxy-out qube that filters access to a list of all…

About “extrepo” and “https_proxy=http://localhost:8082” when installing Librewolf. Proxy with static port is considered risky.

How to install Librewolf

Introduction Although this is not Qubes OS specific, it seems a lot of people struggle installing Librewolf on their qubes, so here is a short community guide explaining how to proceed. Debian Tested on Debian 12 xfce From Installation on Debian based systems – LibreWolf sudo apt update && sudo apt install extrepo -y sudo env https_proxy=http://localhost:8082 extrepo enable librewolf sudo apt update && sudo apt install librewolf -y Fedora Tested on F…