1348481-1.html - mozsearch

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<!DOCTYPE html>

<link id="target" rel="stylesheet" href="data:text/css,">

<link rel="stylesheet" href="data:text/css,div { color: green }">

<link rel="stylesheet" href="data:text/css,">

<div>This should be green</div>

<script>

  onload = function() {

    var link = document.createElement("link");

    link.rel = "stylesheet";

    link.href = "data:text/css,div { color: red; }";

    link.title = "turnitred";

    var target = document.getElementById("target");

    target.parentNode.insertBefore(link, target);

</script>