.MAFF File

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

Files with maff extension can be typically encountered as web data archives produced by Mozilla Firefox or Seamonkey.

How to open:

Use Firefox, to view the content of .maff files. May also be useable in other web browsers based on Firefox, such as Seamonkey.

How to convert:

A direct conversion of any kind seems unlikely, but you can extract the files like any other ZIP archive.