The Mozilla Archive Format (MAFF) is a legacy Web archive file format that was provided by Firefox through an extension,[3] used to store one or more web pages with their associated audio, video, and other related web resources to a single file.

[6] The extension supported versions of Firefox from 2007 to 2017 but not later, and there are no plans to update it.

[8][9] Pale Moon extension MozArchiver, a fork of the original extension, provides the same support for Pale Moon 26.0 and newer.

It also allows for automatic processing, e.g. as Zip-type in local search machines (like DocFetcher).

Pale Moon allows .maff files to be opened in Microsoft Windows.