Perhaps it's just my wimpy laptop, but last time I tried tridactyl it was pretty slow. Vimium (https://addons.mozilla.org/en-GB/firefox/addon/vimium-ff/) has been a bit better for me, although I think it's quite a bit less configurable than tridactyl.
me too, plus some oddities like c-d and c-u are not remapped to d and u like on vimium, while not standard compliant it's a must because it is overridden by a browser bind. otherwise it's fast but there was more stuff which was not great/