diff --git a/accessible/src/generic/DocAccessible-inl.h b/accessible/src/generic/DocAccessible-inl.h
index 58956d8870de..c6c1656500a8 100644
--- a/accessible/src/generic/DocAccessible-inl.h
+++ b/accessible/src/generic/DocAccessible-inl.h
@@ -10,6 +10,7 @@
 #include "DocAccessible.h"
 #include "nsAccessibilityService.h"
 #include "NotificationController.h"
+#include "States.h"
 
 inline void
 DocAccessible::BindChildDocument(DocAccessible* aDocument)
@@ -39,6 +40,21 @@ DocAccessible::UpdateText(nsIContent* aTextNode)
     mNotificationController->ScheduleTextUpdate(aTextNode);
 }
 
+inline void
+DocAccessible::NotifyOfLoad(uint32_t aLoadEventType)
+{
+  mLoadState |= eDOMLoaded;
+  mLoadEventType = aLoadEventType;
+
+  // If the document is loaded completely then network activity was presumingly
+  // caused by file loading. Fire busy state change event.
+  if (HasLoadState(eCompletelyLoaded) && IsLoadEventTarget()) {
+    nsRefPtr<AccEvent> stateEvent =
+      new AccStateChangeEvent(this, mozilla::a11y::states::BUSY, false);
+    FireDelayedAccessibleEvent(stateEvent);
+  }
+}
+
 inline void
 DocAccessible::MaybeNotifyOfValueChange(Accessible* aAccessible)
 {
diff --git a/accessible/src/generic/DocAccessible.cpp b/accessible/src/generic/DocAccessible.cpp
index 3d2ecbe7f92c..0674328ed5f2 100644
--- a/accessible/src/generic/DocAccessible.cpp
+++ b/accessible/src/generic/DocAccessible.cpp
@@ -7,7 +7,6 @@
 #include "AccIterator.h"
 #include "DocAccessible-inl.h"
 #include "nsAccCache.h"
-#include "nsAccessibilityService.h"
 #include "nsAccessiblePivot.h"
 #include "nsAccTreeWalker.h"
 #include "nsAccUtils.h"
@@ -15,7 +14,6 @@
 #include "nsTextEquivUtils.h"
 #include "Role.h"
 #include "RootAccessible.h"
-#include "States.h"
 
 #include "nsIMutableArray.h"
 #include "nsICommandManager.h"
diff --git a/accessible/src/generic/DocAccessible.h b/accessible/src/generic/DocAccessible.h
index 96e89f1a1ecc..f485a365f5e6 100644
--- a/accessible/src/generic/DocAccessible.h
+++ b/accessible/src/generic/DocAccessible.h
@@ -330,12 +330,7 @@ protected:
   /**
    * Marks this document as loaded or loading.
    */
-  void NotifyOfLoad(uint32_t aLoadEventType)
-  {
-    mLoadState |= eDOMLoaded;
-    mLoadEventType = aLoadEventType;
-  }
-
+  void NotifyOfLoad(uint32_t aLoadEventType);
   void NotifyOfLoading(bool aIsReloading);
 
   friend class nsAccDocManager;
diff --git a/accessible/tests/mochitest/Makefile.in b/accessible/tests/mochitest/Makefile.in
index 17bd9557a093..8777e880d5a2 100644
--- a/accessible/tests/mochitest/Makefile.in
+++ b/accessible/tests/mochitest/Makefile.in
@@ -39,6 +39,7 @@ DIRS	= \
 include $(DEPTH)/config/autoconf.mk
 
 MOCHITEST_A11Y_FILES =\
+		dumbfile.xpi \
 		formimage.png \
 		letters.gif \
 		moz.png \
diff --git a/accessible/tests/mochitest/dumbfile.xpi b/accessible/tests/mochitest/dumbfile.xpi
new file mode 100644
index 000000000000..15cb0ecb3e21
Binary files /dev/null and b/accessible/tests/mochitest/dumbfile.xpi differ
diff --git a/accessible/tests/mochitest/events.js b/accessible/tests/mochitest/events.js
index c006639f1c35..1264d9b3973c 100644
--- a/accessible/tests/mochitest/events.js
+++ b/accessible/tests/mochitest/events.js
@@ -1417,7 +1417,8 @@ function caretMoveChecker(aCaretOffset, aTargetOrFunc, aTargetFuncArg)
  * State change checker.
  */
 function stateChangeChecker(aState, aIsExtraState, aIsEnabled,
-                            aTargetOrFunc, aTargetFuncArg, aIsAsync)
+                            aTargetOrFunc, aTargetFuncArg, aIsAsync,
+                            aSkipCurrentStateCheck)
 {
   this.__proto__ = new invokerChecker(EVENT_STATE_CHANGE, aTargetOrFunc,
                                       aTargetFuncArg, aIsAsync);
@@ -1441,6 +1442,11 @@ function stateChangeChecker(aState, aIsExtraState, aIsEnabled,
     is(event.isEnabled(), aIsEnabled,
       "Wrong state of statechange event state");
 
+    if (aSkipCurrentStateCheck) {
+      todo(false, "State checking was skipped!");
+      return;
+    }
+
     var state = aIsEnabled ? (aIsExtraState ? 0 : aState) : 0;
     var extraState = aIsEnabled ? (aIsExtraState ? aState : 0) : 0;
     var unxpdState = aIsEnabled ? 0 : (aIsExtraState ? 0 : aState);
diff --git a/accessible/tests/mochitest/states/Makefile.in b/accessible/tests/mochitest/states/Makefile.in
index 48e6083ac6e2..b76f6740f6e9 100644
--- a/accessible/tests/mochitest/states/Makefile.in
+++ b/accessible/tests/mochitest/states/Makefile.in
@@ -19,6 +19,7 @@ MOCHITEST_A11Y_FILES =\
 		test_controls.html \
 		test_controls.xul \
 		test_doc.html \
+		test_doc_busy.html \
 		test_docarticle.html \
 		test_editablebody.html \
 		test_expandable.xul \
diff --git a/accessible/tests/mochitest/states/test_doc_busy.html b/accessible/tests/mochitest/states/test_doc_busy.html
new file mode 100644
index 000000000000..fd042bd789f4
--- /dev/null
+++ b/accessible/tests/mochitest/states/test_doc_busy.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>states of document</title>
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script type="application/javascript"
+          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript"
+          src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    //gA11yEventDumpToConsole = true; // debugging stuff
+
+    function loadFile()
+    {
+      // XXX: state change busy false event might be delievered when document
+      // has state busy true already (these events should be coalesced actually
+      // in this case as nothing happened).
+      this.eventSeq = [
+        new stateChangeChecker(STATE_BUSY, false, true, document, null, false, true),
+        new stateChangeChecker(STATE_BUSY, false, false, document)
+      ];
+
+      this.invoke = function loadFile_invoke()
+      {
+        synthesizeMouse(getNode("link"), 1, 1, {});
+      }
+
+      this.getID = function loadFile_getID()
+      {
+        return "load file: state busy change events on document";
+      }
+    }
+
+    var gQueue = null;
+    function doTest()
+    {
+      // State busy change event on file loading.
+      //enableLogging("docload"); // debugging
+      gQueue = new eventQueue();
+      gQueue.push(new loadFile());
+      //gQueue.onFinish = function() { disableLogging(); } // debugging
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTest);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     title="Missing busy state change event when downloading files"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=446469">Bug 446469</a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <a id="link" href="http://example.com/a11y/accessible/dumbfile.xpi">a file</a>
+</body>
+</html>