Preload CSS file not supported on Firefox and Safari Mac -


i added attribute rel="preload" css links : 

   <link rel='preload' onload='this.rel="stylesheet"' as='style'  id='reworldmedia-style-css'  href='style.css' type='text/css' media='all'  />

it works fine in chrome not in safari or firefox

for firefox, it's supported in firefox 56 nightly. ship on september 26, 2017. can download here.


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