У вашего броузера проблема в совместимости с HTML5
Foxit replaces Adobe reader. Foxit works the same way adobe reader used to do 5-10 years ago. One would think that adobe evolved into something much better over the years. This is not so. The adobe is extremely non-intuitive for the normal person. It's at least 10x larger than Foxit in hard drive space req. And slow!
Let's try Foxit instead folks!