[chm]

It's relatively unplayable on IceWeasel 38.6.1 (Debian). The graphics are flashing on and off.

[scuba7183]

Same on Firefox 44.0.2 on Win7

[eCa]

Same FF version on win8.1: My car goes full throttle + full turn to the right. Have not yet managed to jump straight (and I can only play Druidia, Road 3).

It works on Chrome on the same computer.

Update: Well, it worked once on Chrome. The next time around the car constantly jumps. Easier to control than full throttle, but not by much.

[viraptor]

same version of FF on win8.1 has no issues

[detaro]

Same on my Windows 7, Firefox and Chrome. Strange that it seems to happen on all kinds of setups.

[fungi]

Firefox 46.0a2 (2016-03-02) on Arch Linux, Intel Graphics. Runs very well.

[rudePolice]

same