.MSF File Overview

File Extension: MSF
File Type Description: Mail Summary File
File Type Developer: Mozilla
Primary Associated Software: Mozilla Thunderbird
Primary Software Developer: Mozilla

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What is File Extension MSF?

Mozilla created the Mail Summary File (MSF) file for the Mozilla Thunderbird software series. Visitor data analysis shows that these Mail Summary File files are typically seen on Windows 10 user machines from Japan. Google Chrome is their primary internet browser for the bulk of these users.

Top MSF User Languages

Top MSF File User Browsers

Desktop Friendly?


Mobile Friendly?


Most Popular MSF File Countries

Top User Operating Systems

Windows 7 Windows 10 Windows 8.1 Windows XP

Associated Operating Systems


Other File Types Related to MSF Files

Extension File Type Developer File Category File Type Description
.ASHX Microsoft Corporation Web Files ASP.NET Web Handler File
.QRM Armangil Software Web Files Qworum Message File
.CPC Cartesian Products, Inc. Raster Image Files CPC Compressed Image File
.TMP Mozilla Backup Files General Temporary File
.DUMP Microsoft Corporation System Files Dump File
.PHP4 Open Source Web Files PHP 4 Web Page
.SLT Mozilla Settings Files Mozilla User Profile Folder
.JPF Joint Photographic Experts Group Raster Image Files JPEG 2000 Image
.LASSO LassoSoft Web Files Lasso Database-Driven Web Page
.MIME Various Developers Encoded Files Multi-Purpose Internet Mail Extension

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