Firefox ESR
Release Notes

A number of features improve the browser experience in enterprise settings.

• MSI installer file type is included in this release, helping make deployments in the Windows environment easier and more flexible.
• Configuration profiles in macOS

• The ability to read added certificates roots from the macOS Keychain

• For all operating systems, we have a number of additional policies including:

• New tab page configuration and disabling
• Local file links
• Download behavior
• Search suggestions
• Managed storage for using policies in Webextensions
• Extension configuration (allow/deny) by ID and website
• A subset of commonly used Firefox preferences

You can see a full list of policies here.

User and enterprise added certificates are read from the operating system by default.

Local files can no longer access other files in the same directory.

Added support for the event property on the Window object to improve web compatibility for enterprises.

Windows Background Intelligent Transfer Service (BITS) update download for proxy users with authentication will fall back to legacy update system on Windows (bug 1561200)

Service workers and push notifications remain disabled in Firefox ESR