This has been a known bug in Firefox for many years. A shadow box can cause it to scroll slowly, or when you animate an element to which a shadow is assigned, Firefox can scan. The fix is ββto limit the blur radius to 10 pixels or filter the shadow from Firefox:
.fubar { box-shadow: 10px 10px 30px #000; -moz-box-shadow:none !important; } @-moz-document url-prefix() { .fubar { box-shadow:none; } }
Al sparber
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