The blink element type was first invented for Netscape Navigator and was supported in its descendants, such as Mozilla Firefox (except for the "Netscape 6" and early Mozilla suite browsers); it was removed in version 23. Microsoft's Internet Explorer and WebKit (the browser engine behind Apple's Safari and Google Chrome) never supported it, even in its CSS incarnation. It was also supported by the Opera Internet Browser, but support ended in version 15 when that browser switched to a WebKit-based engine. Vivaldi, despite its roots as a spiritual successor to the Presto-based Opera, also does not support a functional blink tag.