The attached patch can be applied to firehol-1.91.ebuild to produce firehol-1.120.ebuild (firehol 1.120 has just been released today). It wouldn't hurt to apply it to firehol-1.91.ebuild as well, but I doubt there's much use in doing that.
Created attachment 10251 [details] firehol-1.120.patch
commited -- thanks