--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -2278,16 +2278,21 @@ var NativeWindow = {
    * @param aCategory
    *        Doorhanger type to display (e.g., LOGIN)
    */
     show: function(aMessage, aValue, aButtons, aTabID, aOptions, aCategory) {
       if (aButtons == null) {
         aButtons = [];
       }
 
+      if (aButtons.length > 2) {
+        console.log("Doorhanger can have a maximum of two buttons!");
+        aButtons.length = 2;
+      }
+
       aButtons.forEach((function(aButton) {
         this._callbacks[this._callbacksId] = { cb: aButton.callback, prompt: this._promptId };
         aButton.callback = this._callbacksId;
         this._callbacksId++;
       }).bind(this));
 
       this._promptId++;
       let json = {