Rated 5 out of 5 stars

by Firefox user 2f07bd on Nov. 1, 2018 ·

Works on TB 60.2.1 (64-bit) on Linux. Picked up my keys from the older keyconfig and just worked.
Basic menu commands all seem to be available to (re)map from a straight forward interface with the option to run javascript code for custom keys (not tried so I don't know how limited it is).