Save and Organise web pages with this great addon for Firefox : ScrapBook

ScrapBook is a Firefox extension, which helps you to save Web pages and manage the collection. Key features are lightness, speed, accuracy and multi-language support. 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. Finally ScrapBook items can be in virtually any format: almost anything Firefox can display, ScrapBook can capture.

Major features are: 

• Save Web page
• Save snippet of Web page
• Save Web site (In-depth Capture)
• Organize the collection in the same way as Bookmarks
• Highlighter, Eraser and various page editing features
• Full text search and quick filtering search
• Text edit feature resembling Opera's Notes

Scrapbook plus is modification of the Scrapbook. The difference between them are as follows:
Difference between ScrapBook plus and ScrapBook
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- faster sorting
- faster import and export
- open the window to manage your collection directly from the sidebar
- simplified the handling of the "Combine Wizard"
- new features for "Capture Multiple URLs"
(filter to exclude links, use title of the web site or title of link as new title for the entry in the sidebar, specify waiting time between to download from 0 to 3 seconds, use UTF-8 or ISO-8859-1 as character set)
- new "Capture" window
(download needs to be started manually, automated scrolling turned off)
- 6 highlighters in the editor