FORGOT TO MENTION
1. The translation is automatically copied to clipboard.
2. You can also select text in search boxes or text areas (like the youtube comment box) and alt click the selected text.
3. Alt+Click means hold down alt and left click

Testing:
Tested on the latest firefox including version 3 beta 5. Many have reported it working on ubuntu, mac, vista, xp.

Known Issues:
1. If you have another extension reserving alt click this may not work.
2. If it won’t let you install the extension try the download at the bottom of this video description.

If you want to translate custom stuff you can go directly to
http://translate.google.com/translate_t

Mozilla Page
http://addons.mozilla.org/en-US/firefox/addon/6938

If it doesn’t let you download it try this:
http://www.buildquiz.com/google_translate.zip

Unzip it and then drag and drop google_translate.xpi into firefox.

Also see my learning languages video tutorial
http://youtube.com/watch?v=tYO5aw4wPHE

%%howto

Duration : 0:4:23

[youtube w8YDWtitcRw]