`ExcludedDomains` excludes domains from DNS over HTTPS.
-**Compatibility:** Firefox 63, Firefox ESR 68 (ExcludedDomains added in 75/68.7)\
+`Fallback` determines whether or not Firefox will use your default DNS resolver if there is a problem with the secure DNS provider.
+
+**Compatibility:** Firefox 63, Firefox ESR 68 (ExcludedDomains added in 75/68.7) (Fallback added in 124)\@MAKJ
**CCK2 Equivalent:** N/A\
**Preferences Affected:** `network.trr.mode`, `network.trr.uri`
Software\Policies\Mozilla\Firefox\DNSOverHTTPS\ProviderURL = "URL_TO_ALTERNATE_PROVIDER"
Software\Policies\Mozilla\Firefox\DNSOverHTTPS\Locked = 0x1 | 0x0
Software\Policies\Mozilla\Firefox\DNSOverHTTPS\ExcludedDomains\1 = "example.com"
+Software\Policies\Mozilla\Firefox\DNSOverHTTPS\Fallback = 0x1 | 0x0
```
#### Windows (Intune)
OMA-URI:
<enabled/>
<data id="List" value="1example.com"/>
```
+OMA-URI:
+```
+./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~DNSOverHTTPS/DNSOverHTTPS_Fallback
+```
+Value (string):
+```
+<enabled/> or <disabled/>
+```
#### macOS
```
<dict>
<array>
<string>example.com</string>
</array>
+ <key>Fallback</key>
+ <true/> | <false/>
</dict>
</dict>
```
"Enabled": true | false,
"ProviderURL": "URL_TO_ALTERNATE_PROVIDER",
"Locked": true | false,
- "ExcludedDomains": ["example.com"]
+ "ExcludedDomains": ["example.com"],
+ "Fallback": true | false,
}
}
}