With transition to tiled window managers, tabbed makes less sense.
@@ -7,7 +7,7 @@ URxvt.visualBell: true
URxvt.mapAlert: true
!## extensions
-URxvt.perl-ext-common: default,tabbed,selection
+URxvt.perl-ext-common: default,selection
URxvt.tabbed.tab-fg: 7
URxvt.tabbed.tab-bg: 0
URxvt.tabbed.tabbar-fg: 4