Tips to open MAR file

Can't open the MAR file? You are not the only one. Thousands of users face similar problems every day. Below you will find tips on how to open MAR files as well as a list of programs that support MAR files.

MAR file extension

File Name Mozilla Archive
File Developer Mozilla
File Category Misc Files

The MAR file is supported on 3 operating systems. Depending on your operating system, you may need different software to handle the MAR files. Below is a summary of the number of programs that support and open the MAR file on each system platform.

Operating systems
  • 2
  • 2
  • 1
  • 0
  • 0
  • 0

What is MAR file?

The file in the MAR format belongs to the Misc Files category. The author of this format is Mozilla. In addition to this file, the Misc Files category includes 6033 related files. Mozilla Archive is most often found on 3 operating systems. The file will work on Linux, Mac OS, Windows systems, unfortunately not on others. The Mozilla Thunderbird application is recommended to open the file. It was released by Mozilla Corporation. This file type can also be opened by 4 other programs. The Mozilla Firefox, Mozilla SeaMonkey programs will also handle the file when the Mozilla Thunderbird program does not fulfill its role.

How to open MAR file?

An often recurring problem with Mozilla Archive is that MAR is not associated with the correct program file. This is manifested by the fact that MAR files open in unusual applications or do not have an assigned program. This problem can be easily remedied.

The first thing you should do is just "doubleclick" on the MAR file icon you want to open. If the operating system has an appropriate application to support it and there is also an association between the file and the program, the file should be opened.

Step 1. Install Mozilla Thunderbird

An often overlooked issue is to make sure that Mozilla Thunderbird is installed on the computer. To do this, enter the name Mozilla Thunderbird into the system search engine. If it is not, installation may solve the problem, as most applications create file associations during installation. Below is a list of programs that support the file MAR.

Step 2. Create association of Mozilla Thunderbird with MAR files

If, despite the installed application, the MAR file does not start in the Mozilla Thunderbird application, you must create a file association. It is most convenient to call the context menu with the right mouse button and select Properties. Information about the file and the program that the file is associated with are available here. Using the "Change" button we can set the program to handle this type. It may happen that in the next window there will be no appropriate program - however, this can be corrected with the "Browse" option where you should manually indicate the program location. The "always use the selected program ..." field will set the Mozilla Thunderbird application as the default for handling the MAR file.

Step 3. Update Mozilla Thunderbird to the latest version

The fault may also lie with the Mozilla Thunderbird program, it is possible that Mozilla Archive requires a newer version of the program. This can be done using the application (if it provides such options) or from the Mozilla Corporation website and install the latest version.

Step 4. Check for the following problems with the MAR file

Of course, it may happen that despite the above steps, the file still does not work. File problems can be divided into the following:

The MAR file may be unusually small compared to the original file. Usually this applies to MAR files downloaded from the Internet in case the download did not finish properly. The only repair option is to download the file again.
The computer may have fallen victim to a computer virus or hacker. A virus scan using an up-to-date antivirus program should fix the problem. Alternatively, you can use the scanners available online. The scan should cover the entire computer, not only the MAR file that we want to open. However, remember that not every infected MAR file can be recovered, so it is important to take care of regular backups.
Older version of MAR file may not always be supported by the latest software version. Help should be sought from the software developer, as they usually recommend using free file converters or installing an older version of the program.
There can be many reasons for the failure. The repair method must be adapted to the type of file and damage. Sometimes the program itself has options to repair the most popular MAR file corruption. The easiest way to restore the file is from a backup or by contacting Mozilla, but this one can be expensive. Not all damage can be reversed.
The program indicates that the file is encrypted or corrupted. The encrypted MAR files cannot be played on other computers than the one on which they were encrypted, they must be decrypted before using on another device.
The operating system protects files in some locations (e.g. the root of the system partition) against unauthorized access. These directories are write-protected to them and it's very hard to fix this problem. Copying the MAR file to another location will fix the problem.
This can happen on a file that does not support multiple access. You may find that another program you are using is preventing you from working with the file. Just close unnecessary programs. If the error persists after closing other programs, wait for a while. However, some background programs may block the MAR file while scanning. If this does not work either, restart the device.