Advanced and experimental features

Learn tips beyond the basics and try features before they're released to the public.

Control audio or video playback with your keyboard

This page explains the technical documentation on how to control media in Firefox by using the Media Session API.

Multi-Account Containers is a Firefox WebExtension that lets you separate your work and personal browsing.

Learn more about how to participate in studies.

Pocket for Firefox is used to save a variety of content to one place with the click of a button.

Firefox Sync gives you the ability to sync your preferences across all your Firefox Desktop devices. Learn more.

How to opt out of studies

Learn about Firefox Nightly's error collection policy.

Fingerprinting Protection is an experimental feature that is under heavy development in Firefox.

Firefox 66 introduced DOM events changes for compatibility with legacy content. Learn more.