diff --git a/mozilla/content/html/content/public/nsIFormSubmitObserver.h b/mozilla/content/html/content/public/nsIFormSubmitObserver.h
index 97a4d1130d2..b1b99e321ce 100644
--- a/mozilla/content/html/content/public/nsIFormSubmitObserver.h
+++ b/mozilla/content/html/content/public/nsIFormSubmitObserver.h
@@ -57,6 +57,8 @@ class nsIURI;
 { 0xa6cf9106, 0x15b3, 0x11d2, {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
 
 #define NS_FORMSUBMIT_SUBJECT "formsubmit"
+// used when actionURL is not needed and accuracy of form data is more important
+#define NS_EARLYFORMSUBMIT_SUBJECT "earlyformsubmit"
 #define NS_FIRST_FORMSUBMIT_CATEGORY "firstformsubmit"
 #define NS_PASSWORDMANAGER_CATEGORY "passwordmanager"
 
diff --git a/mozilla/content/html/content/src/nsHTMLFormElement.cpp b/mozilla/content/html/content/src/nsHTMLFormElement.cpp
index 787d80d4f4d..977b91bdd35 100644
--- a/mozilla/content/html/content/src/nsHTMLFormElement.cpp
+++ b/mozilla/content/html/content/src/nsHTMLFormElement.cpp
@@ -291,7 +291,8 @@ protected:
    * @param aCancelSubmit out param where submit observers can specify that the
    *        submit should be cancelled.
    */
-  nsresult NotifySubmitObservers(nsIURI* aActionURL, PRBool* aCancelSubmit);
+  nsresult NotifySubmitObservers(nsIURI* aActionURL, PRBool* aCancelSubmit,
+                                 PRBool aEarlyNotify);
 
   /**
    * Just like GetElementCount(), but doesn't flush
@@ -571,7 +572,11 @@ nsHTMLFormElement::SetAttr(PRInt32 aNameSpaceID, nsIAtom* aName,
       // the second argument is not playing a role at all.
       FlushPendingSubmission();
     }
+    // Don't forget we've notified the password manager already if the
+    // page sets the action/target in the during submit. (bug 343182)
+    PRBool notifiedObservers = mNotifiedObservers;
     ForgetCurrentSubmission();
+    mNotifiedObservers = notifiedObservers;
   }
   return nsGenericHTMLElement::SetAttr(aNameSpaceID, aName, aPrefix, aValue,
                                        aNotify);
@@ -960,7 +965,7 @@ nsHTMLFormElement::SubmitSubmission(nsIFormSubmission* aFormSubmission)
   if (mNotifiedObservers) {
     cancelSubmit = mNotifiedObserversResult;
   } else {
-    rv = NotifySubmitObservers(actionURI, &cancelSubmit);
+    rv = NotifySubmitObservers(actionURI, &cancelSubmit, PR_TRUE);
     NS_ENSURE_SUBMIT_SUCCESS(rv);
   }
 
@@ -969,6 +974,15 @@ nsHTMLFormElement::SubmitSubmission(nsIFormSubmission* aFormSubmission)
     return NS_OK;
   }
 
+  cancelSubmit = PR_FALSE;
+  rv = NotifySubmitObservers(actionURI, &cancelSubmit, PR_FALSE);
+  NS_ENSURE_SUBMIT_SUCCESS(rv);
+
+  if (cancelSubmit) {
+    mIsSubmitting = PR_FALSE;
+    return NS_OK;
+  }
+
   //
   // Submit
   //
@@ -1010,7 +1024,8 @@ nsHTMLFormElement::SubmitSubmission(nsIFormSubmission* aFormSubmission)
 
 nsresult
 nsHTMLFormElement::NotifySubmitObservers(nsIURI* aActionURL,
-                                         PRBool* aCancelSubmit)
+                                         PRBool* aCancelSubmit,
+                                         PRBool  aEarlyNotify)
 {
   // If this is the first form, bring alive the first form submit
   // category observers
@@ -1028,7 +1043,9 @@ nsHTMLFormElement::NotifySubmitObservers(nsIURI* aActionURL,
   NS_ENSURE_SUCCESS(rv, rv);
 
   nsCOMPtr<nsISimpleEnumerator> theEnum;
-  rv = service->EnumerateObservers(NS_FORMSUBMIT_SUBJECT,
+  rv = service->EnumerateObservers(aEarlyNotify ?
+                                   NS_EARLYFORMSUBMIT_SUBJECT :
+                                   NS_FORMSUBMIT_SUBJECT,
                                    getter_AddRefs(theEnum));
   NS_ENSURE_SUCCESS(rv, rv);
 
@@ -1323,7 +1340,7 @@ nsHTMLFormElement::OnSubmitClickBegin()
   // Notify observers of submit
   //
   PRBool cancelSubmit = PR_FALSE;
-  rv = NotifySubmitObservers(actionURI, &cancelSubmit);
+  rv = NotifySubmitObservers(actionURI, &cancelSubmit, PR_TRUE);
   if (NS_SUCCEEDED(rv)) {
     mNotifiedObservers = PR_TRUE;
     mNotifiedObserversResult = cancelSubmit;
diff --git a/mozilla/extensions/wallet/src/nsWalletService.cpp b/mozilla/extensions/wallet/src/nsWalletService.cpp
index 4958a1d4de8..401c32f2e0e 100644
--- a/mozilla/extensions/wallet/src/nsWalletService.cpp
+++ b/mozilla/extensions/wallet/src/nsWalletService.cpp
@@ -299,7 +299,7 @@ nsresult nsWalletlibService::Init()
            do_GetService("@mozilla.org/observer-service;1", &rv);
   if (NS_SUCCEEDED(rv) && svc) {
     // Register as an observer of form submission
-    svc->AddObserver(this, NS_FORMSUBMIT_SUBJECT, PR_TRUE);
+    svc->AddObserver(this, NS_EARLYFORMSUBMIT_SUBJECT, PR_TRUE);
     // Register as an observer of profile changes
     svc->AddObserver(this, "profile-before-change", PR_TRUE);
     // Register as an observer for login
diff --git a/mozilla/toolkit/components/passwordmgr/base/nsPasswordManager.cpp b/mozilla/toolkit/components/passwordmgr/base/nsPasswordManager.cpp
index ee8db881681..adac6666d16 100644
--- a/mozilla/toolkit/components/passwordmgr/base/nsPasswordManager.cpp
+++ b/mozilla/toolkit/components/passwordmgr/base/nsPasswordManager.cpp
@@ -278,7 +278,7 @@ nsPasswordManager::Init()
   nsCOMPtr<nsIObserverService> obsService = do_GetService("@mozilla.org/observer-service;1");
   NS_ASSERTION(obsService, "No observer service");
 
-  obsService->AddObserver(this, NS_FORMSUBMIT_SUBJECT, PR_TRUE);
+  obsService->AddObserver(this, NS_EARLYFORMSUBMIT_SUBJECT, PR_TRUE);
 
   nsCOMPtr<nsIWebProgress> progress = do_GetService(NS_DOCUMENTLOADER_SERVICE_CONTRACTID);
   NS_ASSERTION(progress, "No web progress service");
diff --git a/mozilla/toolkit/components/satchel/src/nsFormHistory.cpp b/mozilla/toolkit/components/satchel/src/nsFormHistory.cpp
index ccdd7477427..c641dc70dd0 100644
--- a/mozilla/toolkit/components/satchel/src/nsFormHistory.cpp
+++ b/mozilla/toolkit/components/satchel/src/nsFormHistory.cpp
@@ -115,7 +115,7 @@ nsFormHistory::Init()
 {
   nsCOMPtr<nsIObserverService> service = do_GetService("@mozilla.org/observer-service;1");
   if (service)
-    service->AddObserver(this, NS_FORMSUBMIT_SUBJECT, PR_TRUE);
+    service->AddObserver(this, NS_EARLYFORMSUBMIT_SUBJECT, PR_TRUE);
   
   return NS_OK;
 }
diff --git a/mozilla/toolkit/components/satchel/src/nsStorageFormHistory.cpp b/mozilla/toolkit/components/satchel/src/nsStorageFormHistory.cpp
index b171d23f826..cd5ba539ccf 100644
--- a/mozilla/toolkit/components/satchel/src/nsStorageFormHistory.cpp
+++ b/mozilla/toolkit/components/satchel/src/nsStorageFormHistory.cpp
@@ -180,7 +180,7 @@ nsFormHistory::Init()
 
   nsCOMPtr<nsIObserverService> service = do_GetService("@mozilla.org/observer-service;1");
   if (service)
-    service->AddObserver(this, NS_FORMSUBMIT_SUBJECT, PR_TRUE);
+    service->AddObserver(this, NS_EARLYFORMSUBMIT_SUBJECT, PR_TRUE);
 
   return NS_OK;
 }