I did some digging around -- it should start appearing in Firefox 9, 10, and 11 (i.e. it will probably be complete in the Nightly channel before the end of the

I did some digging around -- it should start appearing in Firefox 9, 10, and 11 (i.e. it will probably be complete in the Nightly channel before the end of the year, and in Beta/Stable builds next year some time): http://www.extremetech.com/computing/91652-mozilla-unveils-new-firefox-interface-for-firefox-9-and-beyond http://www.extremetech.com/computing/91652-mozilla-unveils-n...