user.js | Firefox, Firefox ESR and Firefox Nightly.

A user.js file for configuring and hardening Firefox privacy.

Concretely, this is a fork from the arkenfox project:

Goals

• enhance privacy
• improve performance
• better fingerprint possible
• reduce automatic connections to the minimum posible

Considerations

This user.js is a fork from the arkenfox project with a substantial divergence. It tries to avoid all the automatic connections even though security could be reduced slightly. For instance, OSCP is a privacy breach. Nevertheless, it is also a security feature. This user.js disables them as well as safebrowsing, automatic addons connections and so on. You will have to check manually addons updates in the related preferences section.

However, 2 connections could not be blocked anymore:

• firefox.settings.services.mozilla.com
• content-signature-2.cdn.mozilla.net

So you will have to include them to the host list of your OS.

Adding new search engines

Installing new search engines from mycroftproject.com is not working. Follow this guide instead:

https://support.mozilla.org/en-US/kb/add-or-remove-search-engine-firefox

Thanks:

I really thank the following authors:

• [Arkenfox] (https://github.com/arkenfox/user.js) - The majority of this user.js and updates.
• [Quindecim] (https://git.nixnet.xyz/quindecim/mobile_user.js) - Some unique strings.