<!DOCTYPE html> <html class=reftest-wait> <body onload=step()> <iframe id=a src=multiple-sets-frame.html></iframe> <iframe id=b src=multiple-sets-frame.html></iframe> <script> var events = 2; // wait for load event and MozReftestInvalidate function step() { if (--events == 0) { var a = document.getElementById("a"); var b = document.getElementById("b"); var a_win = a.contentWindow; var b_win = b.contentWindow; var a_doc = a.contentDocument; var b_doc = b.contentDocument; var face = new a_win.FontFace("Ahem", "url(../fonts/Ahem.ttf)"); a_doc.fonts.add(face); b_doc.fonts.add(face); face.load().then(function() { document.documentElement.className = ""; }); } } window.addEventListener("MozReftestInvalidate", step); </script>