@font-face issue in sharepoint

There is no full screen option for Office 365 Video in Sharepoint (in IE Browser). Placing below line in head tag of html resolves this issue.

<meta http-equiv="X-UA-Compatible" content="IE=Edge,Chrome=1;IE=11;IE=10;IE=9; IE=8; IE=7" />

But because of that IE Browser is getting crashed. After our Root cause analysis, it narrowed to CSS issue.

 @font-face {

    font-family: fontello;

    src: url(fontello.eot?95581469);

    src: url(fontello.eot?95581469#iefix) format('embedded-opentype'),

            url(fontello.woff?95581469) format('woff'),

            url(fontello.ttf?95581469) format('truetype'),

            url(fontello.svg?95581469#fontello) format('svg');

    font-weight: 400;

    font-style: normal;

}

If we take out above code, it is not getting crashed. But this cannot be removed since it is referred at different places in the application.

Any suggestions!