diff --git a/mozilla/camino/resources/application/all-camino.js.in b/mozilla/camino/resources/application/all-camino.js.in
index 8f79737b1bd..70d0771e2ae 100644
--- a/mozilla/camino/resources/application/all-camino.js.in
+++ b/mozilla/camino/resources/application/all-camino.js.in
@@ -236,6 +236,9 @@ pref("browser.safebrowsing.provider.0.reportPhishURL", "http://{moz:locale}.phis
 // Location to more information about the safe browsing feature
 pref("browser.safebrowsing.warning.infoURL", "http://en-us.www.mozilla.com/en-US/firefox/phishing-protection/");
 
+// URL for checking the reason for a malware warning.
+pref("browser.safebrowsing.malware.reportURL", "http://safebrowsing.clients.google.com/safebrowsing/diagnostic?client={moz:client}&hl={moz:locale}&site=");
+
 // Name of the about: page contributed by safebrowsing to handle display of error
 // pages on phishing/malware hits.
 pref("urlclassifier.alternate_error_page", "safebrowsingblocked");
diff --git a/mozilla/camino/src/browser/BrowserWindowController.mm b/mozilla/camino/src/browser/BrowserWindowController.mm
index 6954a9cdd50..e001487dfbc 100644
--- a/mozilla/camino/src/browser/BrowserWindowController.mm
+++ b/mozilla/camino/src/browser/BrowserWindowController.mm
@@ -84,6 +84,7 @@
 #import "ToolbarScriptItem.h"
 #import "SearchEngineManager.h"
 #import "SearchEngineEditor.h"
+#import "CmXULAppInfo.h"
 // For search plugin description keys:
 #import "XMLSearchPluginParser.h"
 
@@ -5166,6 +5167,30 @@ public:
   [self loadURL:blockingInformationURL referrer:nil focusContent:YES allowPopups:NO];  
 }
 
+- (void)showMalwareDiagnosticInformation
+{
+  NSString *malwareDiagnosticURL =
+    [[PreferenceManager sharedInstance] getStringPref:kGeckoPrefSafeBrowsingMalwareDiagnosticURL
+                                          withSuccess:NULL];
+  NSString *locale =
+    [[PreferenceManager sharedInstance] getStringPref:kGeckoPrefUserAgentLocale
+                                        withSuccess:NULL];
+
+  // Fill in certain URL parameter tokens with values.
+  NSMutableString *filledURL = [[malwareDiagnosticURL mutableCopy] autorelease];
+  [filledURL replaceOccurrencesOfString:@"{moz:client}"
+                             withString:[XULAppInfo name]
+                                options:NULL
+                                  range:NSMakeRange(0, [filledURL length])];
+  [filledURL replaceOccurrencesOfString:@"{moz:locale}"
+                             withString:locale
+                                options:NULL
+                                  range:NSMakeRange(0, [filledURL length])];
+  [filledURL appendString:[mBrowserView currentURI]];
+
+  [self loadURL:filledURL referrer:nil focusContent:YES allowPopups:NO];
+}
+
 @end
 
 #pragma mark -
diff --git a/mozilla/camino/src/browser/BrowserWrapper.h b/mozilla/camino/src/browser/BrowserWrapper.h
index d5c5a7f5bde..32d125dc085 100644
--- a/mozilla/camino/src/browser/BrowserWrapper.h
+++ b/mozilla/camino/src/browser/BrowserWrapper.h
@@ -86,6 +86,7 @@ extern NSString* const kBrowserInstanceClosedNotification;
 // Called when the user clicks buttons on the about:safebrowsingblocked error page.
 - (void)runAwayFromSafeBrowsingBlockedSite;
 - (void)showSafeBrowsingInformation;
+- (void)showMalwareDiagnosticInformation;
 
 @end
 
diff --git a/mozilla/camino/src/browser/BrowserWrapper.mm b/mozilla/camino/src/browser/BrowserWrapper.mm
index 3ea3e488108..562084806c5 100644
--- a/mozilla/camino/src/browser/BrowserWrapper.mm
+++ b/mozilla/camino/src/browser/BrowserWrapper.mm
@@ -1103,9 +1103,12 @@ static FlashblockWhitelistManager* sFlashblockWhitelistManager = nil;
         allowPopups:NO];
     }
     else if ([elementIdentifier isEqualToString:@"whyBlockedButton"]) {
-      // Note: pageURI can be examined for e=phishingBlocked or e=malwareBlocked
-      // to customize the blocking info location for each case...
-      [mDelegate showSafeBrowsingInformation];
+      // Examine pageURI for e=phishingBlocked or e=malwareBlocked
+      // to customize the blocking info location for each case.
+      if ([pageURI rangeOfString:@"e=malwareBlocked"].location != NSNotFound)
+        [mDelegate showMalwareDiagnosticInformation];
+      else // e=phishingBlocked
+        [mDelegate showSafeBrowsingInformation];
     }
   }
 }
diff --git a/mozilla/camino/src/preferences/GeckoPrefConstants.h b/mozilla/camino/src/preferences/GeckoPrefConstants.h
index badb8ff0b91..3d4364f9aed 100644
--- a/mozilla/camino/src/preferences/GeckoPrefConstants.h
+++ b/mozilla/camino/src/preferences/GeckoPrefConstants.h
@@ -322,6 +322,7 @@ extern NSString* const kGeckoPrefSafeBrowsingDataProviderReportURL;     // strin
 extern NSString* const kGeckoPrefSafeBrowsingDataProviderGetHashURL;    // string
 
 extern const char* const kGeckoPrefSafeBrowsingInformationURL;          // string
+extern const char* const kGeckoPrefSafeBrowsingMalwareDiagnosticURL;    // string
 extern const char* const kGeckoPrefSafeBrowsingPhishingCheckingEnabled; // bool
 extern const char* const kGeckoPrefSafeBrowsingMalwareCheckingEnabled;  // bool
 extern const char* const kGeckoPrefSafeBrowsingDataProvider;            // int
diff --git a/mozilla/camino/src/preferences/GeckoPrefConstants.mm b/mozilla/camino/src/preferences/GeckoPrefConstants.mm
index daecedddf58..68efcd061be 100644
--- a/mozilla/camino/src/preferences/GeckoPrefConstants.mm
+++ b/mozilla/camino/src/preferences/GeckoPrefConstants.mm
@@ -209,6 +209,7 @@ NSString* const kGeckoPrefSafeBrowsingDataProviderReportURL = @"browser.safebrow
 NSString* const kGeckoPrefSafeBrowsingDataProviderGetHashURL = @"browser.safebrowsing.provider.%i.gethashURL";
 
 const char* const kGeckoPrefSafeBrowsingInformationURL = "browser.safebrowsing.warning.infoURL";
+const char* const kGeckoPrefSafeBrowsingMalwareDiagnosticURL = "browser.safebrowsing.malware.reportURL";
 const char* const kGeckoPrefSafeBrowsingPhishingCheckingEnabled = "browser.safebrowsing.enabled";
 const char* const kGeckoPrefSafeBrowsingMalwareCheckingEnabled = "browser.safebrowsing.malware.enabled";
 const char* const kGeckoPrefSafeBrowsingDataProvider = "browser.safebrowsing.dataProvider";