diff --git a/dom/downloads/src/DownloadsAPI.js b/dom/downloads/src/DownloadsAPI.js
index a87ca1d44457..668c24c70af2 100644
--- a/dom/downloads/src/DownloadsAPI.js
+++ b/dom/downloads/src/DownloadsAPI.js
@@ -206,9 +206,9 @@ function DOMDownloadImpl() {
   this.path = null;
   this.state = "stopped";
   this.contentType = null;
-  this.error = null;
 
   /* fields that require getters/setters */
+  this._error = null;
   this._startTime = new Date();
 
   /* private fields */
@@ -247,6 +247,14 @@ DOMDownloadImpl.prototype = {
     return this.__DOM_IMPL__.getEventHandler("onstatechange");
   },
 
+  get error() {
+    return this._error;
+  },
+
+  set error(aError) {
+    this._error = aError;
+  },
+
   get startTime() {
     return this._startTime;
   },
diff --git a/dom/downloads/tests/test_downloads_basic.html b/dom/downloads/tests/test_downloads_basic.html
index 943da3816307..c5ada1a0ea65 100644
--- a/dom/downloads/tests/test_downloads_basic.html
+++ b/dom/downloads/tests/test_downloads_basic.html
@@ -51,14 +51,10 @@ function checkConsistentDownloadAttributes(download) {
   todo(download.path === expectedDownloadPath,
        "Download path = " + expectedDownloadPath);
 
-  // bug 948287: Accessing startTime attribute at download start fires
-  //             NS_ERROR_UNEXPECTED in emulator
-  //ok(download.startTime >= todayDate,
-  //   "Download start time should be greater than or equal to today");
+  ok(download.startTime >= todayDate,
+     "Download start time should be greater than or equal to today");
 
-  // bug 945366: Accessing error attribute at download start fires
-  //             NS_ERROR_UNEXPECTED in emulator
-  //is(download.error, null, "Download does not have an error");
+  is(download.error, null, "Download does not have an error");
 
   is(download.url, expectedServeURL,
      "Download URL = " + expectedServeURL);
diff --git a/dom/webidl/Downloads.webidl b/dom/webidl/Downloads.webidl
index e547868991b3..862e3b807c3f 100644
--- a/dom/webidl/Downloads.webidl
+++ b/dom/webidl/Downloads.webidl
@@ -59,7 +59,7 @@ interface DOMDownload : EventTarget {
 
   // A DOM error object, that will be not null when a download is stopped
   // because something failed.
-  readonly attribute DOMError error;
+  readonly attribute DOMError? error;
 
   // Pauses the download.
   Promise pause();