correct typo. no need to PP here. 80 column fix. untabify.

browser/base/content/browser.js

@@ -287,13 +287,9 @@ function Startup()
   var sidebarSplitter;
   if (window.opener) {
     var openerSidebarBox = window.opener.document.getElementById("sidebar-box");
-#ifdef XP_MACOSX
-	  // The opener can be the hidden window too, if we're coming from the state where
-    // no windows are open, and the hidden window has no sidebar box. 
+    // The opener can be the hidden window too, if we're coming from the state
+    // where no windows are open, and the hidden window has no sidebar box. 
     if (openerSidebarBox && !openerSidebarBox.hidden) {
-#else
-	  if (!openSidebarBox.hidden) {
-#endif
       var sidebarBox = document.getElementById("sidebar-box");
       var sidebarTitle = document.getElementById("sidebar-title");
       sidebarTitle.setAttribute("value", window.opener.document.getElementById("sidebar-title").getAttribute("value"));