Review for Mozilla Archive Format, with MHT and Faithful Save by Paolo Amadini
Rated 5 out of 5 stars
MAF 0.8.0 for Firefox 3 is now available at the official site:
http://maf.mozdev.org/
It has a lot of improvements over the previous version 0.6.3.
It is also heading towards greater compatibility with UnMHT, so that you'll be able to use both extensions at the same time.
To create your own collections, you must have a Mozilla Add-ons account.