Rated 3 out of 5 stars

The .mht file saved by FF can't be opened by IE, what a pity...

This review is for a previous version of the add-on (0.18.3). 

Mozilla Archive Format creates MHTML files that are standards-compliant, using the Faithful Save or Save Complete components. Thus, the saved files should be 100% compatible with any modern version of Internet Explorer. If you are experiencing a different behavior, please provide more details in the support mailing list, so that any potential incompatibility can be addressed. Thanks!