Here's the link to download Firefox 3.6. However, I warn you HTML5 will not be supported, which is a big downgrade. http://www.mozilla.com/en-US/firefox/all-older.html

Thank you. I appreciate your help and your note. Maybe I'll be happier the next time I download FF 4. :-)

Thank you, too; I've downgraded back to 3.6.16. The main thing that I don't like about Firefox 4 is that it doesn't restore my previous session. I addressed this in another question on the forums. Clicking on "Restore Previous Session" is not a good alternative - initially it resulted in bringing up the previous session, but in such a manner that I had two tabs open with my Home Page, and then most recently it would only open the last tab in which I had been browsing or working, rather than all of them. When this is fixed, I'll be glad to upgrade to Firefox 4. But until then, 4 is just a pain for me. If this doesn't get fixed, and Mozilla stops supporting 3.6.16, I'll guess I'll just have to use a different browser.