FWIW, Firefox Dev Ed / Aurora has had this for a while and has been on 47 since 08 March. https://www.mozilla.org/en-US/firefox/47.0a2/releasenotes/ https://ww

FWIW, Firefox Dev Ed / Aurora has had this for a while and has been on 47 since 08 March. https://www.mozilla.org/en-US/firefox/47.0a2/releasenotes/ https://www.mozilla.org/en-US/firefox/47.0a2/releasenotes/