The File Extensions Database


.MAR File Extension

  • Developer by: Mozilla
  • Category: Misc Files
  • Format: Binary

What is an .MAR file?

.MAR is Mozilla Archive

Application update file used by Mozilla programs such as Firefox, Thunderbird, and SeaMonkey; contains files that update the program to a new version; run by the Mozilla update program (update.exe in Windows), which is included with Mozilla software installations; stored in a custom file format, but Mozilla has made the specification publically available.

Mozilla programs automatically download and run MAR files, so the typical user will never manually open a MAR file. However, MAR files can be used to manually update a Mozilla program without opening it, which can be useful for system administrators.

The Mozilla development team generates nightly builds for their software products that include a MAR update package. Therefore, users can apply software updates with the latest release each day.

NOTE: MAR files created by the Mozilla team use the filename convention [program]-[version].complete.mar and [program]-[version].parial.mar for complete and partial software updates.

Programs that open Mozilla Archive
Windows
Mozilla Firefox
Mozilla Thunderbird
Mozilla SeaMonkey
Mac
Mozilla Firefox
Mozilla Thunderbird
Mozilla SeaMonkey
Linux
Mozilla Firefox
Mozilla Thunderbird
Mozilla SeaMonkey
File Type 2 Microsoft Access Report
Developer by: Microsoft Category: Database Files

Shortcut file created by Microsoft Access, a relational database program for the desktop computer; contains a link to a report in an Access database; can be created by dragging a report object to the desktop and can be opened by double-clicking the file.

Programs that open Microsoft Access Report
Windows
Microsoft Access 2016
File Type 3 Mariner Calc Spreadsheet
Developer by: Mariner Software Category: Spreadsheet Files Format: Binary

Spreadsheet created with Mariner Calc, a lightweight spreadsheet application for Mac OS X; contains data organized into rows and columns; supports functions, charts, named ranges, sorting, and auto-summation.

MAR files are saved in a proprietary format that can only be opened with Mariner Calc.

Programs that open Mariner Calc Spreadsheet
Mac
Mariner Calc XLS

How to solve problems with MAR files

  • Associate the MAR file extension with the correct application. On :
    Windows: Right click on any MAR file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.MAR files". Mac: Right click (or Ctrl-click) the MAR file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .MAR is Mozilla Archive. Because only the current version supports the latest MAR file format. Search, therefore, e.g. on the Mozilla manufacturer website after an available .MAR is Mozilla Archive update.
  • To make sure that your MAR file is not corrupted or virus-infected, get the file again and scan it with antivirus software.