Search this forum -- for example "older version 3.6" or 'older version 2.0'

a few of the suggestions are incorrect as they include a reference to english-- but they will point you in the right direction.

^ why bother posting if you don't have the answer to the question?

You can get Firefox 3.6.16 here.
http://www.mozilla.com/en-US/firefox/all-older.html

Thank you! Problem solved!

I updated to Firefox 4 and could not print. I had to print in Internet Explorer. I went back to Firefox 3.6.16