For visitors to bookmark the site, not posts?

Hi, I have been looking for hours for a solution for my client. His old site used a javascript code (from DynamicDrive). So he asked me to add this functionality to the new site I built for him on WordPress.

I installed your plugin, but I can’t find my way to understand how it works. I found no example of what I should expect to see once people click. A video would be useful.

1- The site does not allow visitors to create accounts
2- Is there a shortcode I can create, to place on the sidebar in a widget? Or a setting for visitors, cross-browsers, where they would just click an icon/button? Like if they were to use CTRL-D?

Thanks!

The page I need help with: [log in to see the link]