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Konqueror i think should Store important or private web documents — like receipts and invoices — on your hard drive as web archive files. While viewing a web document you want to keep, it should allow us to choose Save As from the File menu and the page needs to be stored on computer in a single file with its text, graphics, and layout permanently intact for browsing offline...

Install the konq-plugins module and use the Archive plugins (that will be available in the Tools menu).

i asked the feature to be implemented by default in konqueror...

Marking as implemented. Konqueror plugins is unfortunately part of Extragear.

This has not be implemented.
Implemented is only when this option is available in konqueror by default.
I cannot understand what happened to this thread....why alread implemented...

Because the feature is available from a plugin in extragear. It would not be ideal to integrate this into Konqueror, because then it would add unneeded bloat for users who do not use the feature. This is the same principle once held by Firefox.