| `allowed_types` | This setting whitelists the allowed types of extension/apps that can be installed in Firefox. The value is a list of strings, each of which should be one of the following: "extension", "theme", "dictionary", "langpack" This setting can be used only for the default configuration.
| `blocked_install_message` | This maps to a string specifying the error message to display to users if they're blocked from installing an extension. This setting allows you to append text to the generic error message displayed when the extension is blocked. This could be be used to direct users to your help desk, explain why a particular extension is blocked, or something else.
-**Compatibility:** Firefox 68, Firefox ESR 68\
+**Compatibility:** Firefox 68, Firefox ESR 68, Firefox 68.0.1 (Windows)\
**CCK2 Equivalent:** N/A\
**Preferences Affected:** N/A
#### Windows
-Due to a bug in Firefox 68, this policy is not working via GPO on Windows. We will have a fix soon.
+Currently, you have to remove all newlines from your JSON. We will be removing that limitation in a future release.
+
+Software\Policies\Mozilla\Firefox\ExtensionSettings = '{"*": {"installation_mode": "blocked"}}`
#### macOS
```
<dict>