To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
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).
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.