Can't change date/time format without restarting firefox Rated 3 out of 5 stars

Using latest version from James Cook website and can't change date/time display format. When I change the format, it doesn't get saved! And I had to turn on the add-on bar to even get it to display at all. An O.K. addon but with the issues I'm having I can't give it 5 stars. Using FireFox 7 on Linux.