diff --git a/application/palemoon/base/content/tabbrowser.xml b/application/palemoon/base/content/tabbrowser.xml
index 4764ea9ca..e5c93ec3e 100644
--- a/application/palemoon/base/content/tabbrowser.xml
+++ b/application/palemoon/base/content/tabbrowser.xml
@@ -402,11 +402,18 @@
             let promptBox = {
               appendPrompt : function(args, onCloseCallback) {
                 let newPrompt = document.createElementNS(XUL_NS, "tabmodalprompt");
-                stack.appendChild(newPrompt);
+                // stack.appendChild(newPrompt);
+                stack.insertBefore(newPrompt, browser.nextSibling);
                 browser.setAttribute("tabmodalPromptShowing", true);
 
                 newPrompt.clientTop; // style flush to assure binding is attached
 
+                let prompts = this.listPrompts();
+                if (prompts.length > 1) {
+                  // Let's hide ourself behind the current prompt.
+                  newPrompt.hidden = true;
+                }
+
                 let tab = self._getTabForContentWindow(browser.contentWindow);
                 newPrompt.init(args, tab, onCloseCallback);
                 return newPrompt;
@@ -418,6 +425,7 @@
                 let prompts = this.listPrompts();
                 if (prompts.length) {
                   let prompt = prompts[prompts.length - 1];
+                  prompt.hidden = false;
                   prompt.Dialog.setDefaultFocus();
                 } else {
                   browser.removeAttribute("tabmodalPromptShowing");