I’d rather save that real estate for my browser window. Besides, Fx has an extension for most of the toolbar features. Let’s take a look:

• Google Search

Fx already has a search box. Why add another? Plus, the standard search box can be configured to operate with an armload of search engines other than Google.

• Autolink

Most features already present on a current Google search.

• WordTranslator

That may be useful for some people, but not enough for me to take up space on my browser window. Besides, I have enough trouble with the English language as it is.

• AutoFill

Do you really want an extension that saves your credit card info, while transmitting other info back to Google?

• SpellCheck

This is the only feature worth having the extension on my browser. OTOH, its good brain exercise to actually crack open a dictionary once in a while.

• PageRank Display

I already have an extension that puts PR and Alexa in my status bar, again, saving browser real estate.

• Highlight Search Terms and Word Find Buttons

Hint: just press Alt/F.

Just another tool for the Google assimilation of the world, but what do I know?