For adding keywords from the address bar Rated 1 out of 5 stars

There's a little hack in userChrome.css (you just create this file and paste the contents in and restart Firefox).
http://www.guidingtech.com/5941/add-keywords-bookmark-firefox-address-bar/
Works for me and I like it better than hacking an old extension. I just need the keyword adding from the address bar. I don't know if OpenBook did anything more than that but this is all I need.
Blessings,
Shahar