Works perfectly. The biggest thing missing when coming from Opera/Vivaldi were the rocker gestures. Also not a bloated mess like all the other gesture extensions.

It works like a charm on Linux with FF58! Think to enable new option in about:config and set ui.context_menus.after_mouseup to true

Thanks for this. All I needed in FF57 was a simple extension for rocker gestures. This fits the bill fine.