This build is compatible with Firefox Beta 4.0 b8. It looks like Firefox only allows icons to be placed at the top of the browser window, so you’ll have to select TabsToolbar from the Toolbar Placement dropdown in the General section of the Weather Watcher Live Options window.
Weather Watcher Live Firefox Extension 1.0.14:
http://www.box.net/shared/4h99vvcs0l
