<html> | |
<head> | |
<script> | |
function sendMessage() { alert(getComputedStyle(document.querySelector(".hidden")).display == "none" ? "content blockers enabled" :"content blockers disabled"); } | |
</script> | |
</head> | |
<body onload="sendMessage()"> | |
<p class="hidden"> | |
This text exists to determine if content blockers are enabled. | |
If they're enabled, the computed style of this text will be display:none. | |
</p> | |
</body> | |
</html> |