Excellent! Rated 5 out of 5 stars

Excellent add-on, very much helpful on all sorts of research and archive purposes on the web. As pointed out in several comments, it would be very nice to have:
- a duplicate detection mechanism
- another keyboard shortcut for bookmarking as firefox uses Ctrl+Shift+J
- a way to compress the archive? (or is there already one? as scrapbook has too many functions:)
- a way to export to firefox bookmarks?

Thanks to the developer, this is one of my favourite extensions, and a reason to make firefox indispensable.

This review is for a previous version of the add-on (1.3.4).