Thank you for your feedback!

> Would it be possible to load the bookmark in an iframe below the delete/keep buttons? Maybe you could have a button that does that. It would be better than having to load the pages in a new tab.

This is difficult because it's not possible for a lot of websites because of their security configuration. So it would work for some websites but not for others.

> Is there a way to disable the “Are you sure?” modal dialog? I don’t think it’s needed, and it slows down the process.

There is a checkbox in the header to disable these dialogs. :)