Jolla uses a Qt port of Gecko (ESR, it seems) as the engine of Sailfish Browser, the default browser on Jolla devices. See https://github.com/tmeshkova/qtmozemb

Jolla uses a Qt port of Gecko (ESR, it seems) as the engine of Sailfish Browser, the default browser on Jolla devices. See https://github.com/tmeshkova/qtmozembed https://github.com/tmeshkova/qtmozembed As I understand it, even during the Nokia days, the point was to use Gecko with a Qt-native UI, so it wasn't about getting the entirety of XUL-based Firefox polished on Qt.