A9-toolbar for mozilla/firefox

[nybergh]

I've been using amazon's new search engine www.a9.com instead of google for maybe eight weeks, it gives the same results as google (licensed google tech), but it has interesting features, like the amazon-based login that remembers what you search.

And the toolbar is now available for firefox. What do you think, is it OK to install?

EDIT: and btw, what is the best ad-blocker for firefox?