What is MAB File Extension?


MAB stands for Mozilla Address Book. The file format is used by SeaMonkey and Thunderbird to save contact details like name, address, and phone number. It also supports Netscape and many other Mozilla email apps. It is widely used to save contact for both personal and commercial needs.

SeaMonkey creates two address books including Personal Address book (abook.mab) and Collected Addresses Book (history.mab).

Thunderbird saves data in abook.mab, history.mab and impab.mab (import data to the email programs).


It is counted under Data files category.

Supportive Apps

  • Libra Office
  • Netscape
  • Thunderbird
  • SeaMonkey

There are other email programs supported by the file format.


It was first taken by Netscape and later, the respected Mozilla Foundation has taken the responsibility of the extension.




The location of the file format is depended on the email program you are using.


For Windows the location is

For Mac the location is

How to view the MAB File Extension

It can be accessed by Thunderbird and other related apps like SeaMonkey. The file extension can be viewed using free or paid third applications.