FWIW ... I know this is perhaps too small to mention but I have used Slimbrowser for years and it allows me to place an "X" on each tab in order to close each one. You can also dbl-click on each tab to close. L4 places a single "X" over to the right to close the active tab (or you can right click on the tab to get a selection box). I much prefer the Slimbrowser method ... very easy, very quick, very intuitive.
