+Add or delete PKCS #11 modules.
+
+**Compatibility:** Firefox 114, Firefox ESR 112.12\
+**CCK2 Equivalent:** N/A\
+**Preferences Affected:** N/A
+
+#### Windows (GPO)
+```
+Software\Policies\Mozilla\Firefox\SecurityDevices\Add\NAME_OF_DEVICE_TO_ADD = PATH_TO_LIBRARY_FOR_DEVICE
+Software\Policies\Mozilla\Firefox\SecurityDevices\Remove\1 = NAME_OF_DEVICE_TO_REMOVE
+```
+#### Windows (Intune)
+OMA-URI:
+```
+./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/SecurityDevices/SecurityDevices_Add
+```
+Value (string):
+```
+<enabled/>
+<data id="SecurityDevices" value="NAME_OF_DEVICE_TO_ADDPATH_TO_LIBRARY_FOR_DEVICE"/>
+```
+OMA-URI:
+```
+./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/SecurityDevices/SecurityDevices_Delete
+```
+Value (string):
+```
+<enabled/>
+<data id="SecurityDevices" value="1NAME_OF_DEVICE_TO_REMOVE"/>
+```
+#### macOS
+```
+<dict>
+ <key>SecurityDevices</key>
+ <dict>
+ <key>Add<key>
+ <dict>
+ <key>NAME_OF_DEVICE_TO_ADD</key>
+ <string>PATH_TO_LIBRARY_FOR_DEVICE</string>
+ </dict>
+ <key>Delete</add>
+ <array>
+ <string>NAME_OF_DEVICE_TO_DELETE</string>
+ </array>
+ </dict>
+</dict>
+```
+#### policies.json
+```
+{
+ "policies": {
+ "SecurityDevices": {
+ "Add": {
+ "NAME_OF_DEVICE_TO_ADD": "PATH_TO_LIBRARY_FOR_DEVICE"
+ },
+ "Delete": ["NAME_OF_DEVICE_TO_DELETE"]
+ }
+ }
+}
+```
+### SecurityDevices (Deprecated)
+