Very handy and underrecognized! Rated 5 out of 5 stars

This has to be among the most under-recognized add-ons out there. Fantastic time- and click-saver, so much so that after some easy set-up you'll likely search a lot more -- with the CONTROL you want as well.

For example, here's one of my several entries, which automatically searches (with the right-click context menu) for any highlighted text in Avax:

http://avaxsearch.com/avaxhome_search?q=~VAR~&commit=Go

You can perform actions besides search as well. This sends any selected URL to Google Translate with "detect language" to English:

http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&u=~VAR~&sl=auto&tl=en&history_state0=

I used to do the same thing in IE with IE7Pro. Very happy this add-on provides the capability to FF.