They are using CSS to make the background colour of your selection invisible. You can still select the text; it just looks like you can't. ::selection {

They are using CSS to make the background colour of your selection invisible. You can still select the text; it just looks like you can't. ::selection { background: auto } ::-moz-selection { background: auto } See https://css-tricks.com/almanac/selectors/s/selection/ https://css-tricks.com/almanac/selectors/s/selection/