Oxygen KDE[1]. Admittedly, it's not ideal and sometimes lags behind Firefox version changes, but I've been pretty happy with it. [1]: http://oxygenkde.altervis

Oxygen KDE[1]. Admittedly, it's not ideal and sometimes lags behind Firefox version changes, but I've been pretty happy with it. [1]: http://oxygenkde.altervista.org/ http://oxygenkde.altervista.org/ There are also some Firefox-specific extensions I can't live without any more, the main one being KeySnail[2] which gives me Emacs-style keyboard shortcuts. [2]: https://github.com/mooz/keysnail https://github.com/mooz/keysnail