diff --git a/layout/generic/crashtests/756241-iframe.html b/layout/generic/crashtests/756241-iframe.html
deleted file mode 100644
index 31f48e674371..000000000000
--- a/layout/generic/crashtests/756241-iframe.html
+++ /dev/null
@@ -1,14 +0,0 @@
-3c11T{f@lGr#=_/*?13iz?,w{*cP&amp;>base64,R0lGODlh9AEBAPcAAAT%2BBADiFgASAgAAAFnY0Bu9xgBQUAAAAE4AdBuw4gBQEgAAAAAcAADiABUSAAAAAApU3gAnnwCRgAB8fAAJAAIEAAAAQAAAAAAA0AOwxgBQUAAAAMA3dOAp4hKREgB8AOng9eXin4ESgHwAfAAz4AAI4gGREgB8AFbgfQDiBAASAAAAAMh9AN8EABIAAAAAAHMAEAAAAABAAAAAAOjwB%2BAAABJAAAAAABho5O7h4pASEnwAAHB9AwUEAZEAAHwAAP%2BgqP%2Fh4v8SEv8AAG2VAgUIAJGRAHx8AIUA1OcAUoFAUHwAAAABkAAAARUAFQAAAGACwAMA4gAAEgAAANjIpJbhqxkSUgAAADDwDm8AABVAAAAAAAAAAAAAAABAAAAAAH4AAwDiAQASAMAAAAB1AAApAACRAAB8AP8A1P8A4v9AEv8AAP8B3f8A3%2F8AOv8AfgACAAAAAAAAAAAAAAC5pAApqwCRUgB8AADgBwDiABUSAAAAAPh9YOAEnhIAgAAAfNIAoOYAgIFAFnwAADAzAG8IABWRAAB8AEpQB%2BMWAIECAHwAAMB9AHYEAFAAAAAAADAAAG8AgAFAFgAAAGzwAAAAAABAAAAAADR2AODrABIAAAAAAAAQAADiAAASAAAAADCFAPYrABKDAAB8ABgAaO4AnpAAgHwAfHAA%2FwUA%2F5EA%2F3wA%2F%2F8AYP8Anv8AgP8AfG0pMQW3AJGSAHx8AEqgMfSAAIAWAHwAAAA0gABk6RWDEgB8AAD%2F%2FwD%2F%2FwD%2F%2FwD%2F%2FzAAAG8AABUAAAAAAAD0PAHh4wASEgAAAAA0vgBkOwCDTAB8AFcwHPT244ASEnwAACAYd%2mintcreamBKQTwB8ADAAUG%2B34xWSEgB8AAD%2FNAD%2FZED%2FgwD%2FfPCg8QCA40AWEgAAABA0zeFk%2FxKD%2FwB8fwA4wADj4wASEgAAAEjnoOFkgBKDFgB8AJWINAhkZJGDg3x8fAABoAAAgEAAFgAAAPAxdvQA6wAAAAAAAAiUANTiABISAAAAAPC36eEszhKRRwB8ACH5BAAAAAAALAAAAAD0AQEABwgnAAEIHEiwoMGDCBMqXMiwocOHECNKnEixosWLGDNq3Mixo8ePBAMCADs%3D"); margin: -392939391.549em 48746 179702455257068050 24031.6107403em; margin: 8740405610469337203em 3421465784em 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999em 1406645209; -moz-animation: anim2 104s linear alternate infinite; border: 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999px outset ButtonFace;>><style>
-:not([lang]) {
-    -moz-transition-duration: 126ms, -9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999ms;
-    word-break: break-all
-    }
-:-moz-locale-dir(ltr) {
-    padding: 5013733513791602130ch;
-    overflow-y: scroll;
-    -moz-margin-start: 43425em;
-    }
-::first-letter {
-    color: red
-}
-</style>
\ No newline at end of file
diff --git a/layout/generic/crashtests/756241.html b/layout/generic/crashtests/756241.html
deleted file mode 100644
index e7d841b03413..000000000000
--- a/layout/generic/crashtests/756241.html
+++ /dev/null
@@ -1,38 +0,0 @@
-<!DOCTYPE HTML>
-<html class="reftest-wait"><head>
-    <meta charset="utf-8">
-    <title>Testcase for bug 756241</title>
-<script>
-function reload() {
-  this.location.reload();
-}
-// Run the test for 3 seconds
-setTimeout(function() {
-    try {
-      for (var i=0; i < window.frames.length; ++i) {
-        window.frames[i].location = 'about:blank';
-      }
-    } finally {
-      document.documentElement.removeChild(document.body);
-      document.documentElement.className = "";
-    }
-  }, 3000);
-</script>
-</head>
-<body onload="document.body.getBoundingClientRect()">
-
-<iframe onload="this.contentWindow.setTimeout(reload,1113)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1233)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1313)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1433)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1113)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1233)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1313)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1433)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1113)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1233)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1313)" src="756241-iframe.html"></iframe>
-<iframe onload="this.contentWindow.setTimeout(reload,1433)" src="756241-iframe.html"></iframe>
-
-</body>
-</html>
diff --git a/layout/generic/crashtests/crashtests.list b/layout/generic/crashtests/crashtests.list
index 8805ff742cf2..9dfb8e4e25c7 100644
--- a/layout/generic/crashtests/crashtests.list
+++ b/layout/generic/crashtests/crashtests.list
@@ -455,7 +455,6 @@ test-pref(layout.css.flexbox.enabled,true) load 737313-2.html
 test-pref(layout.css.flexbox.enabled,true) load 737313-3.html
 load 747688.html
 load 750066.html
-asserts(0-10000) load 756241.html
 test-pref(font.size.inflation.emPerLine,15) asserts(1-100) load font-inflation-762332.html # bug 762332
 load 762902.html
 load 762764-1.html
