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Firefox ESR release cycle

Firefox ESR release cycle

Firefox offers an Extended Support Release (ESR) based on a regular release of Firefox for desktop for use by organizations. Learn more.

Choose a Firefox update channel

Choose a Firefox update channel

How to choose between rapid release and extended support release (ESR).

Set up Certificate Authorities (CAs) in Firefox

Set up Certificate Authorities (CAs) in Firefox

Learn how to set up certificate authorities (CAs) for your organization in Firefox for Enterprise.

Legacy browser support extension for Windows

Legacy browser support extension for Windows

Add-ons and older versions of Firefox ESR may enable your users to run legacy add-ons and view websites that require Internet Explorer.