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diff --git a/dom/indexedDB/test/test_file_cross_database_copying.html b/dom/indexedDB/test/test_file_cross_database_copying.html
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+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html>
+<head>
+  <title>Indexed Database Property Test</title>
+
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+
+  <script type="text/javascript;version=1.7">
+  function testSteps()
+  {
+    const READ_WRITE = "readwrite";
+
+    const databaseInfo = [
+      { name: window.location.pathname + "1" },
+      { name: window.location.pathname + "2" }
+    ];
+
+    const objectStoreName = "Blobs";
+
+    const fileData = { key: 1, file: getRandomFile("random.bin", 100000) };
+
+    SpecialPowers.pushPrefEnv({ set: [["dom.indexedDB.dataThreshold", -1]] },
+                              continueToNextStep);
+    yield undefined;
+
+    let databases = [];
+    for (let info of databaseInfo) {
+      let request = indexedDB.open(info.name, 1);
+      request.onerror = errorHandler;
+      request.onupgradeneeded = grabEventAndContinueHandler;
+      request.onsuccess = grabEventAndContinueHandler;
+      let event = yield undefined;
+
+      is(event.type, "upgradeneeded", "Got correct event type");
+
+      let db = event.target.result;
+      db.onerror = errorHandler;
+
+      let objectStore = db.createObjectStore(objectStoreName, { });
+      objectStore.add(fileData.file, fileData.key);
+
+      event = yield undefined;
+
+      is(event.type, "success", "Got correct event type");
+
+      databases.push(db);
+    }
+
+    let refResult;
+    for (let db of databases) {
+      let request = db.transaction([objectStoreName])
+                      .objectStore(objectStoreName).get(fileData.key);
+      request.onsuccess = grabEventAndContinueHandler;
+      event = yield undefined;
+
+      let result = event.target.result;
+      verifyBlob(result, fileData.file, 1);
+      yield undefined;
+
+      if (!refResult) {
+        refResult = result;
+        continue;
+      }
+
+      isnot(getFilePath(result), getFilePath(refResult), "Different os files");
+    }
+
+    for (let i = 1; i < databases.length; i++) {
+      let db = databases[i];
+
+      let objectStore = db.transaction([objectStoreName], READ_WRITE)
+                          .objectStore(objectStoreName);
+
+      request = objectStore.add(refResult, 2);
+      request.onsuccess = grabEventAndContinueHandler;
+      event = yield undefined;
+
+      is(event.target.result, 2, "Got correct key");
+
+      request = objectStore.get(2);
+      request.onsuccess = grabEventAndContinueHandler;
+      event = yield undefined;
+
+      let result = event.target.result;
+      verifyBlob(result, refResult, 2);
+      yield undefined;
+
+      isnot(getFilePath(result), getFilePath(refResult), "Different os files");
+    }
+
+    is(bufferCache.length, 2, "Correct length");
+
+    finishTest();
+    yield undefined;
+  }
+  </script>
+  <script type="text/javascript;version=1.7" src="file.js"></script>
+  <script type="text/javascript;version=1.7" src="helpers.js"></script>
+
+</head>
+
+<body onload="runTest();"></body>
+
+</html>