diff --git a/mozilla/embedding/browser/webBrowser/nsIWebBrowserChrome.idl b/mozilla/embedding/browser/webBrowser/nsIWebBrowserChrome.idl
index 937ea5579d1..6a39d1f07ad 100644
--- a/mozilla/embedding/browser/webBrowser/nsIWebBrowserChrome.idl
+++ b/mozilla/embedding/browser/webBrowser/nsIWebBrowserChrome.idl
@@ -73,6 +73,9 @@ interface nsIWebBrowserChrome : nsISupports
     const unsigned long CHROME_WITH_SIZE        = 0x00001000;
     const unsigned long CHROME_WITH_POSITION    = 0x00002000;
 
+    // special cases
+    const unsigned long CHROME_WINDOW_MIN       = 0x00004000;
+
     const unsigned long CHROME_WINDOW_RAISED    = 0x02000000;
     const unsigned long CHROME_WINDOW_LOWERED   = 0x04000000;
     const unsigned long CHROME_CENTER_SCREEN    = 0x08000000;
diff --git a/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.cpp b/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.cpp
index 657904330a6..706eaf7520b 100644
--- a/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.cpp
+++ b/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.cpp
@@ -1037,6 +1037,8 @@ PRUint32 nsWindowWatcher::CalculateChromeFlags(const char *aFeatures,
                  ? nsIWebBrowserChrome::CHROME_SCROLLBARS : 0;
   chromeFlags |= WinHasOption(aFeatures, "resizable", 0, &presenceFlag)
                  ? nsIWebBrowserChrome::CHROME_WINDOW_RESIZE : 0;
+  chromeFlags |= WinHasOption(aFeatures, "minimizable", 0, &presenceFlag)
+                 ? nsIWebBrowserChrome::CHROME_WINDOW_MIN : 0;
 
   /* OK.
      Normal browser windows, in spite of a stated pattern of turning off
diff --git a/mozilla/xpfe/appshell/src/nsAppShellService.cpp b/mozilla/xpfe/appshell/src/nsAppShellService.cpp
index 07d22346eaa..bbea27424d7 100644
--- a/mozilla/xpfe/appshell/src/nsAppShellService.cpp
+++ b/mozilla/xpfe/appshell/src/nsAppShellService.cpp
@@ -607,6 +607,10 @@ nsAppShellService::JustCreateTopWindow(nsIXULWindow *aParent,
         if (!(aChromeMask & nsIWebBrowserChrome::CHROME_OPENAS_DIALOG))
           widgetInitData.mBorderStyle = NS_STATIC_CAST(enum nsBorderStyle, widgetInitData.mBorderStyle | eBorderStyle_minimize | eBorderStyle_maximize | eBorderStyle_menu);
       }
+      // Min button only?
+      if (aChromeMask & nsIWebBrowserChrome::CHROME_WINDOW_MIN) {
+        widgetInitData.mBorderStyle = NS_STATIC_CAST(enum nsBorderStyle, widgetInitData.mBorderStyle | eBorderStyle_minimize );
+      }  
     }
 
     if (aChromeMask & nsIWebBrowserChrome::CHROME_SCROLLBARS)
diff --git a/mozilla/xpfe/components/ucth/src/nsUnknownContentTypeHandler.cpp b/mozilla/xpfe/components/ucth/src/nsUnknownContentTypeHandler.cpp
index 6b838d55177..cbb72e772be 100644
--- a/mozilla/xpfe/components/ucth/src/nsUnknownContentTypeHandler.cpp
+++ b/mozilla/xpfe/components/ucth/src/nsUnknownContentTypeHandler.cpp
@@ -211,7 +211,7 @@ nsUnknownContentTypeHandler::ShowProgressDialog(nsIHelperAppLauncher *aLauncher,
                                                     "sss%ip",
                                                     "chrome://global/content/helperAppDldProgress.xul",
                                                     "_blank",
-                                                    "chrome,titlebar",
+                                                    "chrome,titlebar,minimizable",
                                                     (const nsIID*)(&NS_GET_IID(nsIHelperAppLauncher)),
                                                     (nsISupports*)aLauncher );
                     if ( argv ) {
diff --git a/mozilla/xpfe/components/xfer/src/nsStreamXferOp.cpp b/mozilla/xpfe/components/xfer/src/nsStreamXferOp.cpp
index fc02caaa5a6..ded9c360b8a 100644
--- a/mozilla/xpfe/components/xfer/src/nsStreamXferOp.cpp
+++ b/mozilla/xpfe/components/xfer/src/nsStreamXferOp.cpp
@@ -94,7 +94,7 @@ nsStreamXferOp::OpenDialog( nsIDOMWindowInternal *parent ) {
                                                 "sss%ip",
                                                 "chrome://global/content/downloadProgress.xul",
                                                 "_blank",
-                                                "chrome,titlebar",
+                                                "chrome,titlebar,minimizable",
                                                 (const nsIID*)(&NS_GET_IID(nsIStreamTransferOperation)),
                                                 (nsISupports*)(nsIStreamTransferOperation*)this );
                 if ( argv ) {