The site itself is fantastic! Puntuado con 5 de 5 estrellas

But what is a difference between the statusbutton and bookmark?
I bookmarked your site, and now can access it via bookmark.
I got a real pleasure from your site, but didn't understand what does this button give in addition to bookmark. Maybe I do something wrong?

Esta valoración es de una versión anterior del complemento (statusbutton1.1-signed.1-signed). 

You are correct...

Thank you for trying my add-on! No, you did not do something wrong, you did it right. You are thus far correct, the button functions only as an alternative to a bookmark at this time. The website is a work-in-progress and the improvements are hardly noticeable for now... the button itself spares the user the inconvenience of scrolling through bookmarks to find the site, eliminating a cumbersome and time consuming task while running other applications. To be candid about it, I seldom use bookmarks, and needed a fast and easy way to share some helpful 3D links, while being able to show at the website some examples of what is available to beginners in 3D. It is also animated to improve the appearance of an otherwise lifeless screen. I hope this explains my add-on.

I am glad you are pleased with website.
Thank you very much for your kind words!