I said this elsewhere, but I switched over to vimperator and order was restored to the universe.

Give Vimperator a shot. I found it to be 100% compatible with my usage of Pentadactyl (bmark bookmarklets, etc.) and it's working just fine with FF15.

Didn't know Vimp was the common ancestor. Copied my .pentadactylrc into .vimperatorrc and most of it works.