Grease Monkey

I just started using Grease Monkey with Mozilla Firefox. Grease Monkey ends the debate for me. Until Google Chrome supports Grease Monkey (I don't know that Chrome does yet), I'm going to be using Firefox. Java Scripts and Grease Monkey are ultra useful. For example, I just installed a script that allows me to highlight any text, press a key for instance 'w' that automatically wikis the highlighted text or if I press 'g' the highlighted text is googled in a new tab. I had to modify the script a bit since the searches were in French. I even added my own search key to the script to translate any word I highlight in English to Spanish at wordreference.com.