Switching tabs in Firefox/FreeBSD

As you know, lazywrites doesn't want to use the mouse...it's too much of an effort. And when I open a bunch of tabs in Firefox in Windows XP of Mac OS X I can flip through them by pressing Ctrl+Tab on the keyboard. KDE/FreeBSD, on the other hand, thinks I want to switch desktops. Feh. The work-around? Use Ctrl+Page Up or Ctrl+Page Down. Ta-da.