Fix available at mozilla.org, works with FF4 Rated 5 out of 5 stars

I made my fix available as an addon at mozilla.org. I also solved the problem with FF4.

https://addons.mozilla.org/firefox/addon/good-old-youtube-downloader/

Suggestions and bug reports are welcome!

This review is for a previous version of the add-on (1.5).  This user has other reviews of this add-on.