Maximum SSL version enabled

Supported on: Firefox 66 or later, Firefox 60.6 ESR or later

Registry

HKLM Software\Policies\Mozilla\Firefox
HKCU Software\Policies\Mozilla\Firefox

Options

SSLVersionMax enum
  • TLS 1.0 -> tls1
  • TLS 1.1 -> tls1.1
  • TLS 1.2 -> tls1.2
  • TLS 1.3 -> tls1.3

Description

If this policy is enabled, Firefox will not use SSL/TLS versions greater than the value specified. If this policy is disabled or not configured, Firefox defaults to a maximum of TLS 1.3.