I just added a feature to the right hand navigation.
In Firefox on my Mac, it doesn’t seem to work.
Safari on my Mac works a little better. But not perfectly.
Click PLAY or watch it on YouTube.
The company noted my problem. And is working on a FIX. Thanks. I’ll wait on that.
UPDATE – Looks like it does not yet work on WordPress.com sites like this one. I took it out for now.
Rick McCharles 
Hi, this is Taylor at PrintFriendly.
I see that it’s having trouble on your site.
PrintFriendly works in all browsers… there’s some other issue going on here.
I’ve created a ticket in our system and we’ll get it fixed by next week.
Thanks for giving us a shot.
Thanks Taylor. That’s great proactive service.
(Perhaps WordPress.com is disabling something. They are very security oriented.)