Perfect... almost Rated 5 out of 5 stars
Excellent add-on, easier and simpler, than any other on the "accelerator" search. The right-click implementation is really nice and unobtrusive. The "add to firefox" instead of "add to explorer" script-scenario is a bit strange, and not all of the add-ons work, but I believe it's a matter of time.
What it does lack is the ability to change accelerators' order and grouping - the list gets clumsy as you add new items. And it really lacks the option to delete all the default engines! They are all useless in a non-European or American country but they still take up the place. And one more idea - the add-on won't work for words in forms (textareas) - and I feel I need it from time to time.
Will be waiting for an update!