A mar file extension is related to the MSN Explorer web browser.
MAR file extension - MSN archive
What is mar file? How to open mar files?
The mar file extension was also used for some compressed archive format used by old MSN Explorer a web browsing utility for Microsoft Windows. These file stored bitmaps, html files and other data.
This mar file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open mar file:
Company or developer:
Microsoft Corporation
MSN Explorer is a web browser with integrated many Windows Live features based on Internet Explorer. MSN Explorer integrates on one place Windows Live Hotmail, Calendar, Live Adress book, Live Messenger, MSN Money and others.
List of recommended software applications associated to the .mar file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open mar file, edit mar file, convert mar file, view mar file, play mar file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with mar file - MSN archive
Click on the software link for more information about MSN Explorer. MSN Explorer uses mar file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).