User Agent: Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.75 Safari/537.36 Steps to reproduce: Use the tool fontfaceobserver https://github.com/bramstein/fontfaceobserver and load google fonts with CSS loaded asynchronously using loadCSS https://github.com/filamentgroup/loadCSS Preferably use Windows and not Mac. Please note: this bug is not easily reproducible as it works as expected many times. Please refresh using a *clear cache* multiple times to reproduce. Actual results: Firefox 44/45-beta unable to work correctly. Firefox Nightly however works correctly. Expected results: Fontfaceobserver should have run properly.
Demo at my website: www.concertedaction.com