why does the wordpress fonts not work on firefox/chrome except on safari [closed]

On my Dell Latitude, the icons do not appear on Chrome, Firefox and Edge. This is on Windows 10. The problem does not show up on safari for windows and macbook. network console shows the correct path nevertheless.

Poking into the CSS file, I find

arbfonts-face {
    font-family: 'icomoon';
    src:url('icomoon.eot');
    src:url('icomoon.eot?#iefix') format('embedded-opentype'),
        url('icomoon.woff') format('woff'),
        url('icomoon.ttf') format('truetype'),
        url('icomoon.svg#icomoon') format('svg');
    font-weight: normal;
    font-style: normal;
}