Customize controls, options and add-ons

Make Firefox yours by adding and managing the features that you want.

• Firefox controls and buttons
• Tab settings
• Customize Firefox with add-ons, plugins, and extensions
• Firefox options, preferences and settings
• Bookmark options
• Make Firefox your default browser Make web links open in Firefox automatically by setting it as the default browser on your computer. This article explains how to do that.
• Customize Firefox controls, buttons and toolbars Firefox is easy to customize. Put your favorite features right where you want them. We'll show you how.
• Block and unblock websites with parental controls on Firefox This article explains how to block websites or filter website content in Firefox that may be offensive or inappropriate for children.
• How to sync your add-ons with another copy of Firefox This article contains steps for enabling add-on synchronization across devices.
• Access your add-ons with Firefox Accounts Add-ons is using Firefox Accounts to offer a more integrated experience across all Mozilla services and products.
• HTML5 audio and video in Firefox Firefox plays certain HTML5 audio and video content on web pages without a plugin. Learn about these media formats and how to manage them.