--- a/mobile/android/components/NSSDialogService.js
+++ b/mobile/android/components/NSSDialogService.js
@@ -32,17 +32,17 @@ NSSDialogs.prototype = {
     }
     return this.bundle.GetStringFromName(aName);
   },
 
   formatString: function(aName, argList) {
     if (!this.bundle) {
       this.bundle = Services.strings.createBundle("chrome://browser/locale/pippki.properties");
     }
-    return this.bundle.formatStringFromName(aName, argList, 1);
+    return this.bundle.formatStringFromName(aName, argList, argList.length);
   },
 
   getPrompt: function(aTitle, aText, aButtons) {
     return new Prompt({
       title: aTitle,
       text: aText,
       buttons: aButtons,
     });
@@ -165,38 +165,39 @@ NSSDialogs.prototype = {
     }
 
     let organizationString = this.formatString("clientAuthAsk.organization",
                                                [organization]);
     let issuerString = this.formatString("clientAuthAsk.issuer",
                                          [issuer]);
     let serverRequestedDetails = cn + '<br/>' + organizationString + '<br/>' + issuerString;
 
-    selectedIndex = 0;
+    selectedIndex.value = 0;
     while (true) {
       let prompt = this.getPrompt(this.getString("clientAuthAsk.title"),
                                      this.getString("clientAuthAsk.message1"),
                                      [ this.getString("nssdialogs.ok.label"),
                                        this.getString("clientAuthAsk.viewCert.label"),
                                        this.getString("nssdialogs.cancel.label")
                                      ])
       .addLabel({ id: "requestedDetails", label: serverRequestedDetails } )
       .addMenulist({
         id: "nicknames",
         label: this.getString("clientAuthAsk.message2"),
-        values: certNickList, selected: selectedIndex
+        values: certNickList,
+        selected: selectedIndex.value,
       }).addCheckbox({
         id: "rememberBox",
         label: this.getString("clientAuthAsk.remember.label"),
         checked: rememberSetting
       });
       let response = this.showPrompt(prompt);
-      selectedIndex = response.nicknames;
+      selectedIndex.value = response.nicknames;
       if (response.button == 1) {
-        this.viewCertDetails(certDetailsList[selectedIndex]);
+        this.viewCertDetails(certDetailsList[selectedIndex.value]);
         continue;
       } else if (response.button == 0) {
         canceled.value = false;
         if (response.rememberBox == true) {
           aCtx.QueryInterface(Ci.nsIClientAuthUserDecision).rememberClientAuthCertificate = true;
         }
         return true;
       }