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Mozilla archive format
File type: Archive and compressed file
Files with maff extension can be typically encountered as web data archives produced by Mozilla Firefox or Seamonkey.
File type category:
Archive and compressed file
Date updated: June 27, 2025
File extension maff is used for Mozilla archive format. These are a variant of .zip files that contain one or more web pages, images, or other downloadable content, like video and audio.
Additional information, like the original page address, is saved along with the content; this metadata allows the browser to open these files intelligently.
MIME types:
application/x-maff
Use Firefox, to view the content of .maff files. May also be useable in other web browsers based on Firefox, such as Seamonkey.
A direct conversion of any kind seems unlikely, but you can extract the files like any other ZIP archive.
Software applications that can open maff files:
Apple macOS / Mac OS X
Linux/Unix
Software apps that create maff files:
Apple macOS / Mac OS X
Linux/Unix