+### SSLVersionMax
+A String value that sets and locks the maximum version of TLS
+
+**Compatibility:** Firefox 67, Firefox ESR 60.7\
+**CCK2 Equivalent:** N/A
+**Preferences Affected:** `security.tls.version.max`
+
+#### Windows
+| Type | Registry Location |
+| ---- | ----------------- |
+| `Windows:REG_SZ` | `Software\Policies\Mozilla\Firefox\SSLVersionMax` |
+
+#### macOS
+```
+<dict>
+ <key>SSLVersionMax</key>
+ <string>tls1 | tls1.1 | tls1.2 | tls1.3<string>
+</dict>
+```
+
+#### JSON