Bug 1648642 - Handle registry errors gracefully. r=mconley

Differential Revision: https://phabricator.services.mozilla.com/D81608

toolkit/components/enterprisepolicies/EnterprisePolicies.js

@@ -595,11 +595,15 @@ class WindowsGPOPoliciesProvider {
   }
 
   _readData(wrk, root) {
-    wrk.open(root, "SOFTWARE\\Policies", wrk.ACCESS_READ);
-    if (wrk.hasChild("Mozilla\\" + Services.appinfo.name)) {
-      this._policies = WindowsGPOParser.readPolicies(wrk, this._policies);
+    try {
+      wrk.open(root, "SOFTWARE\\Policies", wrk.ACCESS_READ);
+      if (wrk.hasChild("Mozilla\\" + Services.appinfo.name)) {
+        this._policies = WindowsGPOParser.readPolicies(wrk, this._policies);
+      }
+      wrk.close();
+    } catch (e) {
+      log.error("Unable to access registry - ", e);
     }
-    wrk.close();
   }
 }