diff --git a/dom/base/crashtests/326778-1.xul b/dom/base/crashtests/326778-1.xul
deleted file mode 100644
index ea235730abcf..000000000000
--- a/dom/base/crashtests/326778-1.xul
+++ /dev/null
@@ -1,11 +0,0 @@
-<?xml version="1.0"?>
-<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-<script>
-<![CDATA[
-try {
-  document.getBoxObjectFor({});
-} catch(e) { }
-]]>
-</script>
-</window>
diff --git a/dom/base/crashtests/crashtests.list b/dom/base/crashtests/crashtests.list
index 8dca43844166..03dc30af3f11 100644
--- a/dom/base/crashtests/crashtests.list
+++ b/dom/base/crashtests/crashtests.list
@@ -11,7 +11,6 @@ load 308120-1.xul
 load 325730-1.html
 load 326618-1.html
 load 326646-1.html
-load 326778-1.xul
 load 326865-1.html
 load 327571-1.html
 load 327694.html
diff --git a/dom/base/test/mochitest.ini b/dom/base/test/mochitest.ini
index cb5d09d19ded..e29db8634c93 100644
--- a/dom/base/test/mochitest.ini
+++ b/dom/base/test/mochitest.ini
@@ -308,7 +308,6 @@ skip-if = toolkit == 'android'
 [test_bug338679.html]
 [test_bug339494.html]
 [test_bug339494.xhtml]
-[test_bug340571.html]
 [test_bug343596.html]
 [test_bug345339.html]
 [test_bug346485.html]
diff --git a/dom/base/test/test_bug340571.html b/dom/base/test/test_bug340571.html
deleted file mode 100644
index c0289e9a9de3..000000000000
--- a/dom/base/test/test_bug340571.html
+++ /dev/null
@@ -1,28 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<!--
-https://bugzilla.mozilla.org/show_bug.cgi?id=340571
--->
-<head>
-  <title>Test for Bug 340571</title>
-  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-</head>
-<body>
-<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=340571">Mozilla Bug 340571</a>
-<p id="display"></p>
-<div><select id="sel"></select></div>
-<script type="application/javascript">
-ok(!document.getBoxObjectFor, "Detecting getBoxObjectFor");
-try {
-  document.getBoxObjectFor(document.body);
-  ok(false, "getBoxObjectFor succeeded");
-} catch (e) {
-  ok(true, "getBoxObjectFor succeeded");
-}
-
-var sel = document.getElementById("sel");
-ok(!sel.boxObject, "Getting boxObject");
-</script>
-</body>
-</html>
diff --git a/dom/xul/crashtests/326644-2-inner.xul b/dom/xul/crashtests/326644-2-inner.xul
deleted file mode 100644
index efbbc1c6225f..000000000000
--- a/dom/xul/crashtests/326644-2-inner.xul
+++ /dev/null
@@ -1,10 +0,0 @@
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml"
- title="Testcase bug 326644 - Crash when changing enumerated properties of objects in xul">
-<html:script><![CDATA[
-function doe() {
-document.documentElement.boxObject.firstChild.hidden = true;
-document.documentElement.boxObject.firstChild.tooltip = 'test';
-}
-setTimeout(doe,100);
-]]></html:script>
-</window>
diff --git a/dom/xul/crashtests/326644-2.html b/dom/xul/crashtests/326644-2.html
deleted file mode 100644
index 68fd49c75d5b..000000000000
--- a/dom/xul/crashtests/326644-2.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<html class="reftest-wait">
-<head>
-<script>
-setTimeout('document.documentElement.className = ""', 1000);
-</script>
-<body>
-<iframe src="326644-2-inner.xul"></iframe>
-</body>
-</html>
diff --git a/dom/xul/crashtests/crashtests.list b/dom/xul/crashtests/crashtests.list
index 699e3ab17b90..eb1c79034af2 100644
--- a/dom/xul/crashtests/crashtests.list
+++ b/dom/xul/crashtests/crashtests.list
@@ -4,7 +4,6 @@ load 253479-1.xul
 load 253479-2.xul
 load 326204-1.xul
 load 326644-1.html
-load 326644-2.html
 load 326864-1.xul
 load 326875-1.xul
 load 326881-1.xul
diff --git a/layout/xul/crashtests/327776-1.xul b/layout/xul/crashtests/327776-1.xul
deleted file mode 100644
index af889493cd73..000000000000
--- a/layout/xul/crashtests/327776-1.xul
+++ /dev/null
@@ -1,24 +0,0 @@
-<?xml version="1.0"?>
-<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-<script>
-<![CDATA[
-function init()
-{ 
-  var span = document.getElementsByTagName("span")[0]; 
-  var boxobj = document.getBoxObjectFor(span);
-  try {
-    boxobj.setPropertyAsSupports(undefined, undefined);
-  } catch(e) {
-  }
-}
-window.addEventListener("load", init, false);
-]]>
-</script>
-
-<body xmlns="http://www.w3.org/1999/xhtml">
-
-<span></span>
-
-</body>
-</window>
diff --git a/layout/xul/crashtests/346083-1.xul b/layout/xul/crashtests/346083-1.xul
deleted file mode 100644
index e04d610a4fa2..000000000000
--- a/layout/xul/crashtests/346083-1.xul
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0"?>
-<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-<body xmlns="http://www.w3.org/1999/xhtml">
-
-<script>
-<![CDATA[
-document.getBoxObjectFor(document.getElementsByTagName("body")[0]).setProperty("foo", undefined);
-]]>
-</script>
-
-</body>
-</window>
diff --git a/layout/xul/crashtests/346281-1.xul b/layout/xul/crashtests/346281-1.xul
deleted file mode 100644
index 4ef6701558c7..000000000000
--- a/layout/xul/crashtests/346281-1.xul
+++ /dev/null
@@ -1,17 +0,0 @@
-<?xml version="1.0"?>
-<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-<body xmlns="http://www.w3.org/1999/xhtml">
-
-<script>
-<![CDATA[
-var boxy = document.getBoxObjectFor(document.getElementsByTagName("body")[0]);
-boxy.setPropertyAsSupports("zoink", undefined);
-try {
-  boxy.removeProperty(undefined);
-} catch(e) { }
-]]>
-</script>
-
-</body>
-</window>
diff --git a/layout/xul/crashtests/407152.xul b/layout/xul/crashtests/407152.xul
deleted file mode 100644
index 0a5adf69eb52..000000000000
--- a/layout/xul/crashtests/407152.xul
+++ /dev/null
@@ -1,7 +0,0 @@
-<triple xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" style="display: block;">
-<box style="display: block; position: relative; -moz-binding: url(data:text/xml;charset=utf-8,%3Cbindings%20xmlns%3D%22http%3A//www.mozilla.org/xbl%22%3E%0A%3Cbinding%20id%3D%22a%22%3E%0A%3Cimplementation%3E%0A%3Cfield%20name%3D%22_field%22%3Ethis.ownerDocument.getBoxObjectFor%28this.ownerDocument.documentElement%29%3B%3C/field%3E%0A%3C/implementation%3E%0A%3Ccontent%3E%0A%3C/binding%3E%0A%3C/bindings%3E);">
-<box style="position: fixed; -moz-binding: url(data:text/xml;charset=utf-8,%3Cbindings%20xmlns%3D%22http%3A//www.mozilla.org/xbl%22%3E%0A%3Cbinding%20id%3D%22a%22%3E%0A%3Ccontent%3E%0A%3Cchildren%20xmlns%3D%22http%3A//www.mozilla.org/xbl%22/%3E%3C/content%3E%3C/binding%3E%3C/bindings%3E);"/>
-<iframe/>
-</box>
-<scrollbox onoverflow="document.documentElement.removeAttribute('style')"/>
-</triple>
\ No newline at end of file
diff --git a/layout/xul/crashtests/crashtests.list b/layout/xul/crashtests/crashtests.list
index fd7187e3ffe1..f8c22cf26fc7 100644
--- a/layout/xul/crashtests/crashtests.list
+++ b/layout/xul/crashtests/crashtests.list
@@ -15,15 +15,12 @@ load 321056-1.xhtml
 load 322786-1.xul
 load 325377.xul
 load 326879-1.xul
-load 327776-1.xul
 load 328135-1.xul
 load 329327-1.xul
 load 329407-1.xml
 load 329477-1.xhtml
 load 336962-1.xul
 load 344228-1.xul
-load 346083-1.xul
-load 346281-1.xul
 load 350460.xul
 load 365151.xul
 load 366112-1.xul
@@ -49,7 +46,6 @@ load 391974-1.html
 load 399013.xul
 load 402912-1.xhtml
 load 404192.xhtml
-load 407152.xul
 load 408904-1.xul
 load 412479-1.xhtml
 load 417509.xul
