ScrapBook is aptly named: it is your personal repository for the text snippets, PDFs, web pages, movies and whatever you collect in your travels around the web. These three points are important. ScrapBook is personal in the sense that your scrapbook is part of your Firefox profile by default. It is also personal in that you decide how you want to organise your collection. It is a repository since it makes a local snapshot of the web content you specify.