.MBR File Extension
File Type 1Master Boot Record File
What is an MBR file?
System file used by Linux operating systems; contains the master boot record, which is used to startup, or bootstrap, the operating system; used for saving or distributing the MBR data.
File Type 2Zune Smooth Streaming File
.MBR File Association 2
Multimedia file used by Zune, an audio and video player for Windows; contains a link to an audio or video file purchased through the Zune service, but does not include the actual audio or video data itself; enables multimedia files to be streamed without having to store them locally.