diff --git a/content/treestyletab/treestyletab.css b/content/treestyletab/treestyletab.css
index ad7664f4..b1d87987 100644
--- a/content/treestyletab/treestyletab.css
+++ b/content/treestyletab/treestyletab.css
@@ -330,7 +330,7 @@ tabbrowser[treestyletab-tabbar-autohide-mode="1"][treestyletab-tabbar-autohide="
 .tabbrowser-tabs[treestyletab-hide-alltabs-button="true"]
   .tabs-alltabs-stack,
 .tabbrowser-tabs[treestyletab-hide-alltabs-button="true"]
-  .tabbrowser-arrowscrollbox ~ stack /* "all tabs" button in Firefox 3.0-3.5 */ {
+  .tabbrowser-arrowscrollbox ~ stack /* "all tabs" button in Firefox 3.5 */ {
 	visibility: collapse !important;
 }
 
@@ -388,10 +388,3 @@ image.tab-icon {
 	visibility: collapse;
 }
 
-/* Tab Utilities + Firefox 3.0 (not 3.5 and later!) */
-tabbrowser[treestyletab-mode="vertical"]
-  .tabs-stack
-  > *:first-child + *
-  > hbox:not(.tabs-apptabs-container) {
-	-moz-box-flex: 1 !important;
-}
diff --git a/content/treestyletab/treestyletab.js b/content/treestyletab/treestyletab.js
index 1224f536..ec586b53 100644
--- a/content/treestyletab/treestyletab.js
+++ b/content/treestyletab/treestyletab.js
@@ -261,6 +261,7 @@ var TreeStyleTabService = {
 
 
 
+
 						behavior += this.kGROUP_BOOKMARK_USE_DUMMY;
 					if (!this.getTreePref('openGroupBookmarkBehavior.confirm')) {
 						behavior += (
@@ -636,7 +637,7 @@ try{
 			};
 		}
 
-		// auto-switch for staying on tabs (Firefox 3.0 or later)
+		// auto-switch for staying on tabs (Firefox 3.5 or later)
 		if (
 			setEffectAllowedFunc &&
 			info.position == this.kDROP_ON &&