/CSS/Also define the standard property 'border-radius' for compatibility css(vendor prefix)

Also define the standard property 'border-radius' for compatibility css(vendor prefix)

.scrollbar-black::-webkit-scrollbar-thumb {
    border-radius: 10px;
    -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.1);
            box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.1); // <- Add this to fix.    
    background-color: #000;
}

Source: stackoverflow.com

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