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. Major features are:
The extension is not compatible with Firefox 57. It still works on XUL-based Firefox forks like Waterfox
Wysigot is far more than just a simple off-line browser!
It captures the entire contents of your sites, with their scripts, flashes, cookies etc., but offers numerous other functions as well.
It monitors your pages and sites, and alerts you to anything new.
For example Wysigo.Discontinued
The program is no longer updated. Last version, 6.1, released in January 2009, can be still downloaded from the official website.