Advanced and experimental features

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

Configuration Editor for Firefox

Learn about the Firefox about:config page and how to use the Configuration Editor to view, change, or reset advanced preference settings.

Multi-Account Containers

Add Container tabs to Firefox with the Multi-Account Containers add-on, to separate your work and personal browsing.

Sync custom preferences

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

Compact mode workaround in Firefox

Learn about a workaround that lets you active compact mode if you need to. This feature isn't supported and we still recommend using normal mode.

Windows SSO

Use Windows single sign-on (SSO) to log in to Microsoft, work, and school accounts with credentials from your Windows 10 or 11 operating system.

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Grow and share your expertise with others. Answer questions and improve our knowledge base.

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