+### MasterPassword
+Require or prevent using a master password.
+
+If this value is true, a master password is required. If this values is false, it works the same as `DisableMasterPasswordCreation` and removes the master password functionality.
+
+**Compatibility:** Firefox 78, Firefox ESR 78\
+**CCK2 Equivalent:** `noMasterPassword`\
+**Preferences Affected:** N/A
+
+#### Windows (GPO)
+```
+Software\Policies\Mozilla\Firefox\MasterPassword = 0x1 | 0x0
+```
+#### Windows (Intune)
+OMA-URI:
+```
+./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/MasterPassword
+```
+Value (string):
+```
+<enabled/> or <disabled/>
+```
+#### macOS
+```
+<dict>
+ <key>MasterPassword</key>
+ <true/> | <false/>
+</dict>
+```
+#### policies.json
+```
+{
+ "policies": {
+ "MasterPassword": true | false
+ }
+}
+```