Except where noted, everything here applies to both Firefox 124 and the Firefox 115.9 ESR.

Policies

• The DNSOverHTTPS policy has been updated to support setting a Fallback value to prevent falling back to your default DNS Provider. This does not apply to the ESR.
• The AllowFileSelectionDialogs policy has been added for controlling file selection dialogs. This policy is not available on the ESR.