Mozilla Archive Format


The Mozilla Archive Format is a web page archiving format provided by Firefox through an extension. It is used to save one or more web pages together with their associated audio, video, and other related web resources to a single file. Unlike MHTML, which uses MIME encoding within a single HTML file, MAFF compresses the page into a ZIP container file.
The extension no longer works on newer versions of Firefox. The author has stated that future support will not be added. But it is still supported in Cyberfox and Waterfox, forks of Firefox that try to keep features removed from Firefox like the traditional extension API. Browser extension WebScrapBook, available for Firefox 57+ and Chromium-based browsers, supports saving and opening MAFF files. Pale Moon extension MozArchiver, a fork of original extension, bring the same support for Pale Moon 26.0 and newer.

Format Licensing

MAFF is an open file format. The file format specification is published.