The addon site is even more ridiculous than I thought. As I said before it reads what version of Firefox you are visiting with and blocks you from down loading an addon or theme that is not compatible even if you want to. The way around that is to visit the site with IE If you do you can download anything if you are signed in. Nice planning. Make people use you competitor's product if they want full access to your site
If somebody isn't fired over this site upgrade there is a problem.