У вашего броузера проблема в совместимости с HTML5
Most digital marketers know what pixels are...but as you get deeper into the media buying game, you'll start hearing about these things called postback URLs.
To be successful, you'll need to know the difference, which you should want, and what it takes to succeed with each.
In this video, AdSkills teacher John Belcher breaks down the difference between pixels and postback URLs.