Linux didn't take over the desktop, it took over the browser
More than half of the web browsers in use are running some variant of KHTML, the rendering engine for the KDE web browser.
KHTML - Konqueror (newer versions can use Webkit too)
Webkit (Apple fork of KHTML) - Safari, Amazon Kindle, Dolphin, Rekonq, Midori, Steam ingame browser
Blink (Google fork of Webkit) - Chrome, Chromium, Iron, Opera, Vivaldi
This is not an exhaustive list. I left out a bunch of really obscure browsers.