This lightbox utility is really very nice. It is easy to use adds "polish" to a website. I'm a website developer, and needed a way create sites I've developed in a thumbnail gallery where clicking-on/displaying a site wouldn't take the view out of my web page. This extension is a great solution because the website displays in a lightbox and the view never leaves the site.
These folks do great work AND have great support. When I found that some of my website where "breaking" out of the light box, I posted the problem in their support forum. ARI responded with good information in just a few hours that helped me solve the problem quickly.
You won't be disappointed with this extension.