Customize controls, options and add-ons

Firefox options, preferences and settings

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

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

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

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

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

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.

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.

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