| **[`SupportMenu`](#supportmenu)** | Add a menuitem to the help menu for specifying support information.
| **[`UserMessaging`](#usermessaging)** | Don't show certain messages to the user.
| **[`WebsiteFilter`](#websitefilter)** | Block websites from being visited.
+| **[`WindowsSSO`](#windowssso)** | Allow Windows single sign-on for Microsoft, work, and school accounts.
### 3rdparty
`SuggestURLTemplate` is a search suggestions URL with {searchTerms} to substitute for the search term.
-**Compatibility:** Firefox ESR 60 (POST support in Firefox ESR 68)\
+`Encoding` is the query charset for the engine. It defaults to UTF-8.
+
+**Compatibility:** Firefox ESR 60 (POST support in Firefox ESR 68, Encoding support in Firefox 91)\
**CCK2 Equivalent:** `searchplugins`\
**Preferences Affected:** N/A
```
Value (string):
```
-<enabled/>
-<data id="WebsiteFilter" value="1<all_urls>"/>
+<enabled/> <data id="WebsiteFilter" value="1<all_urls>"/>
```
OMA-URI:
```
}
}
```
+### WindowsSSO
+Allow Windows single sign-on for Microsoft, work, and school accounts.
+
+If this policy is set to true, Firefox will use credentials stored in Windows to sign in to Microsoft, work, and school accounts.
+
+**Compatibility:** Firefox 91\
+**CCK2 Equivalent:** N/A\
+**Preferences Affected:** network.http.windows-sso.enabled
+
+#### Windows (GPO)
+```
+Software\Policies\Mozilla\Firefox\WindowsSSO = 0x1 | 0x0
+```
+#### Windows (Intune)
+OMA-URI:
+```
+./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/WindowsSSO
+```
+Value (string):
+```
+<enabled/> or <disabled/>
+```
+#### policies.json
+```
+{
+ "policies": {
+ "WindowsSSO": true | false
+ }
+}
+```
\ No newline at end of file