Notes about the MASS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The MASS file type is primarily associated with 'Mass Downloader' by MetaProducts Corporation. Mass Downloader (MD) is a Windows program that allows you to download individual files (or lists of files) from Web and FTP sites at the maximum available speed. Multiple channel technology reduces download time. MD also allows you to browse ZIP archives before loading them and to choose only the desired file(s) to download. Downloads get the .MASS extension while downloading and it is removed when the download is complete.