diff --git a/dlls/mshtml/mshtml_private.h b/dlls/mshtml/mshtml_private.h
index 7d4d00ac619..d501da3cc44 100644
--- a/dlls/mshtml/mshtml_private.h
+++ b/dlls/mshtml/mshtml_private.h
@@ -726,6 +726,7 @@ void register_nsservice(nsIComponentRegistrar*,nsIServiceManager*);
 void init_nsio(nsIComponentManager*,nsIComponentRegistrar*);
 void release_nsio(void);
 BOOL install_wine_gecko(BOOL);
+BOOL is_gecko_path(const char*);
 
 HRESULT nsuri_to_url(LPCWSTR,BOOL,BSTR*);
 HRESULT create_doc_uri(HTMLWindow*,WCHAR*,nsWineURI**);
diff --git a/dlls/mshtml/nsembed.c b/dlls/mshtml/nsembed.c
index f0eb1015f20..4b7cada2f7d 100644
--- a/dlls/mshtml/nsembed.c
+++ b/dlls/mshtml/nsembed.c
@@ -74,6 +74,8 @@ static nsIMemory *nsmem = NULL;
 static const WCHAR wszNsContainer[] = {'N','s','C','o','n','t','a','i','n','e','r',0};
 
 static ATOM nscontainer_class;
+static WCHAR gecko_path[MAX_PATH];
+static unsigned gecko_path_len;
 
 static LRESULT WINAPI nsembed_proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
@@ -411,6 +413,7 @@ static BOOL init_xpcom(const PRUnichar *gre_path)
     nsIComponentRegistrar *registrar = NULL;
     nsAString path;
     nsIFile *gre_dir;
+    WCHAR *ptr;
 
     nsAString_InitDepend(&path, gre_path);
     nsres = NS_NewLocalFile(&path, FALSE, &gre_dir);
@@ -428,6 +431,13 @@ static BOOL init_xpcom(const PRUnichar *gre_path)
         return FALSE;
     }
 
+    strcpyW(gecko_path, gre_path);
+    for(ptr = gecko_path; *ptr; ptr++) {
+        if(*ptr == '\\')
+            *ptr = '/';
+    }
+    gecko_path_len = ptr-gecko_path;
+
     nsres = nsIServiceManager_QueryInterface(pServMgr, &IID_nsIComponentManager, (void**)&pCompMgr);
     if(NS_FAILED(nsres))
         ERR("Could not get nsIComponentManager: %08x\n", nsres);
@@ -788,6 +798,26 @@ void close_gecko(void)
     /* if (hXPCOM) FreeLibrary(hXPCOM); */
 }
 
+BOOL is_gecko_path(const char *path)
+{
+    WCHAR *buf, *ptr;
+    BOOL ret;
+
+    buf = heap_strdupAtoW(path);
+    if(strlenW(buf) < gecko_path_len)
+        return FALSE;
+
+    buf[gecko_path_len] = 0;
+    for(ptr = buf; *ptr; ptr++) {
+        if(*ptr == '\\')
+            *ptr = '/';
+    }
+
+    ret = !strcmpiW(buf, gecko_path);
+    heap_free(buf);
+    return ret;
+}
+
 /**********************************************************
  *      nsIWebBrowserChrome interface
  */
diff --git a/dlls/mshtml/nsio.c b/dlls/mshtml/nsio.c
index 46988f667a9..cdd1e24874e 100644
--- a/dlls/mshtml/nsio.c
+++ b/dlls/mshtml/nsio.c
@@ -2566,6 +2566,13 @@ static BOOL is_gecko_special_uri(const char *spec)
             return TRUE;
     }
 
+    if(!strncasecmp(spec, "file:", 5)) {
+        const char *ptr = spec+5;
+        while(*ptr == '/')
+            ptr++;
+        return is_gecko_path(ptr);
+    }
+
     return FALSE;
 }