Cómo desactivar CSS de selección TXT

/* To desactivate text selection */
    user-select: none; /* Normal (chrome)*/
	-webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
    -khtml-user-select: none; /* Konqueror HTML */
    -moz-user-select: none; /* Old versions of Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
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