Customize controls, options and add-ons

Firefox options, preferences and settings

Settings panels give you access to Firefox settings. This article describes what types of settings are available in each panel.

Last updated: 03/10/2024

Your organization or Internet Service Provider may offer or require you to use a proxy to connect to the Internet. Learn more.

Last updated: 11/18/2023

Learn what pop-up windows are and what settings Firefox has for blocking or allowing them.

Last updated: 08/04/2022

There are special situations where a browsing session may be lost. This article will show you how to recover your lost session.

Last updated: 12/30/2023

This article describes what JavaScript is and how to allow or block it on certain websites.

Last updated: 06/06/2022

This article describes how to customize the way you see websites by choosing font styles and colors that will override those used by the websites.

Last updated: 05/11/2024

Learn how to change the email program that Firefox opens when you click a “mailto” link, or use the “Email Link” and “Email Image” features.

Last updated: 12/11/2023

How to disable the Enterprise Roots preference to fix TLS connection errors caused by antivirus software, without compromising security.

Last updated: 06/05/2022