Scrapbook is a iceweasel/firefox extension, which helps you to save web pages and manage the collection. key features are lightness, speed, accuracy and multi-language support. 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