UnMHT Extension


#1

https://addons.mozilla.org/en-US/firefox/addon/unmht/

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.


#2

May I suggest a better alternative for saving self-contained pages? "Save Page" add-on