Policy for Disable Safe Mode. Fixes #18
       <string id="DisablePocket_Explain">Prevents ability to save webpages to Pocket.</string>
       <string id="DisablePrivateBrowsing">Disable Private Browsing</string>
       <string id="DisablePrivateBrowsing_Explain">Disables private browsing.</string>
+      <string id="DisableSafeMode">Disable Safe Mode</string>
+      <string id="DisableSafeMode_Explain">Prevents ability to restart in safe mode.</string>
       <string id="DisableSysAddonUpdate">Disable System Addon Updates</string>
       <string id="DisableSysAddonUpdate_Explain">Prevent the browser from installing and updating system addons.</string>
       <string id="DisplayBookmarksToolbar">Display Bookmarks Toolbar</string>
 
         <decimal value="0"/>
       </disabledValue>
     </policy>
+    <policy name="DisableSafeMode" class="Both" displayName="$(string.DisableSafeMode)" explainText="$(string.DisableSafeMode_Explain)" key="Software\Policies\Mozilla\Firefox" valueName="DisableSafeMode">
+      <parentCategory ref="firefox"/>
+      <supportedOn ref="SUPPORTED_WINXPSP2"/>
+      <enabledValue>
+        <decimal value="1"/>
+      </enabledValue>
+      <disabledValue>
+        <decimal value="0"/>
+      </disabledValue>
+    </policy>
     <policy name="DisableSysAddonUpdate" class="Both" displayName="$(string.DisableSysAddonUpdate)" explainText="$(string.DisableSysAddonUpdate_Explain)" key="Software\Policies\Mozilla\Firefox" valueName="DisableSysAddonUpdate">
       <parentCategory ref="firefox"/>
       <supportedOn ref="SUPPORTED_WINXPSP2"/>