diff --git a/content/base/test/file_bug945152.jar b/content/base/test/file_bug945152.jar
new file mode 100644
index 000000000000..23cc979b170d
Binary files /dev/null and b/content/base/test/file_bug945152.jar differ
diff --git a/content/base/test/file_bug945152_worker.js b/content/base/test/file_bug945152_worker.js
new file mode 100644
index 000000000000..c0520bbd83a9
--- /dev/null
+++ b/content/base/test/file_bug945152_worker.js
@@ -0,0 +1,98 @@
+var gData1 = "TEST_DATA_1:ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+var gData2 = "TEST_DATA_2:1234567890";
+var gPaddingChar = '.';
+var gPaddingSize = 10000;
+var gPadding = "";
+
+for (var i = 0; i < gPaddingSize; i++) {
+  gPadding += gPaddingChar;
+}
+
+function ok(a, msg) {
+  postMessage({type: 'status', status: !!a, msg: msg });
+}
+
+function is(a, b, msg) {
+  postMessage({type: 'status', status: a === b, msg: msg });
+}
+
+function checkData(response, data_head, cb) {
+  ok(response, "Data is non-null");
+  var str = String.fromCharCode.apply(null, Uint8Array(response));
+  ok(str.length == data_head.length + gPaddingSize, "Data size is correct");
+  ok(str.slice(0, data_head.length) == data_head, "Data head is correct");
+  ok(str.slice(data_head.length) == gPadding, "Data padding is correct");
+  cb();
+}
+
+self.onmessage = function onmessage(event) {
+
+  function test_mapped_sync() {
+    var xhr = new XMLHttpRequest({mozAnon: true, mozSystem: true});
+    xhr.open('GET', 'jar:http://example.org/tests/content/base/test/file_bug945152.jar!/data_1.txt', false);
+    xhr.responseType = 'arraybuffer';
+    xhr.send();
+    if (xhr.status) {
+      ok(xhr.status == 200, "Status is 200");
+      var ct = xhr.getResponseHeader("Content-Type");
+      ok(ct.indexOf("mem-mapped") != -1, "Data is memory-mapped");
+      checkData(xhr.response, gData1, runTests);
+    }
+  }
+
+  function test_mapped_async() {
+    var xhr = new XMLHttpRequest({mozAnon: true, mozSystem: true});
+    xhr.open('GET', 'jar:http://example.org/tests/content/base/test/file_bug945152.jar!/data_1.txt');
+    xhr.responseType = 'arraybuffer';
+    xhr.onreadystatechange = function() {
+      if (xhr.readyState !== xhr.DONE) {
+        return;
+      }
+      if (xhr.status) {
+        ok(xhr.status == 200, "Status is 200");
+        var ct = xhr.getResponseHeader("Content-Type");
+        ok(ct.indexOf("mem-mapped") != -1, "Data is memory-mapped");
+        checkData(xhr.response, gData1, runTests);
+       }
+    }
+    xhr.send();
+  }
+
+  // Make sure array buffer retrieved from compressed file in package is
+  // handled by memory allocation instead of memory mapping.
+  function test_non_mapped() {
+    var xhr = new XMLHttpRequest({mozAnon: true, mozSystem: true});
+    xhr.open('GET', 'jar:http://example.org/tests/content/base/test/file_bug945152.jar!/data_2.txt');
+    xhr.responseType = 'arraybuffer';
+    xhr.onreadystatechange = function() {
+      if (xhr.readyState !== xhr.DONE) {
+        return;
+      }
+      if (xhr.status) {
+        ok(xhr.status == 200, "Status is 200");
+        var ct = xhr.getResponseHeader("Content-Type");
+        ok(ct.indexOf("mem-mapped") == -1, "Data is not memory-mapped");
+        checkData(xhr.response, gData2, runTests);
+       }
+    }
+    xhr.send();
+  }
+
+  var tests = [
+    test_mapped_sync,
+    test_mapped_async,
+    test_non_mapped
+  ];
+
+  function runTests() {
+    if (!tests.length) {
+      postMessage({type: 'finish' });
+      return;
+    }
+
+    var test = tests.shift();
+    test();
+  }
+
+  runTests();
+};
diff --git a/content/base/test/mochitest.ini b/content/base/test/mochitest.ini
index 7c9270779a17..408d081a5d6f 100644
--- a/content/base/test/mochitest.ini
+++ b/content/base/test/mochitest.ini
@@ -135,6 +135,8 @@ support-files =
   file_bug902350.html
   file_bug902350_frame.html
   file_bug907892.html
+  file_bug945152.jar
+  file_bug945152_worker.js
   file_general_document.html
   file_html_in_xhr.html
   file_html_in_xhr.sjs
@@ -544,6 +546,8 @@ skip-if = buildapp == 'b2g' || toolkit == 'android' || e10s #needs plugin suppor
 [test_bug907892.html]
 [test_bug922681.html]
 [test_bug927196.html]
+[test_bug945152.html]
+run-if = os == 'linux'
 [test_caretPositionFromPoint.html]
 [test_classList.html]
 # This test fails on the Mac for some reason
diff --git a/content/base/test/test_bug945152.html b/content/base/test/test_bug945152.html
new file mode 100644
index 000000000000..3f7144f158c7
--- /dev/null
+++ b/content/base/test/test_bug945152.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=945152
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 945152</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=945152">Mozilla Bug 945152</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+function runTest() {
+  var worker = new Worker("file_bug945152_worker.js");
+
+  worker.onmessage = function(event) {
+    if (event.data.type == 'finish') {
+      SimpleTest.finish();
+    } else if (event.data.type == 'status') {
+      ok(event.data.status, event.data.msg);
+    }
+  };
+
+  worker.onerror = function(event) {
+    is(event.target, worker);
+    ok(false, "Worker had an error: " + event.data);
+    SimpleTest.finish();
+  };
+
+  worker.postMessage(true);
+}
+
+SimpleTest.waitForExplicitFinish();
+
+addLoadEvent(function() {
+   SpecialPowers.pushPrefEnv({"set": [["dom.mapped_arraybuffer.enabled", true]]}, function() {
+     SpecialPowers.pushPermissions([{'type': 'systemXHR', 'allow': true, 'context': document}], runTest);
+   });
+});
+</script>
+</pre>
+</body>
+</html>