Convert mslz to xpi

What is the difference between .mslz and .xpi?

Description: MSLZ is an archive file format developed by Microsoft. It is a compressed version of the LZX compression algorithm which is used to reduce the size of files and folders. The files can be opened with the MSLZ Viewer, a free utility that is included with Microsoft Office.; Efficient XML Interchange (EXI) is a binary XML format for exchange of data on a computer network. It was developed by the W3C's Efficient Extensible Interchange Working Group and is one of the most prominent efforts to encode XML documents in a binary data format, rather than plain text. Using EXI format reduces the verbosity of XML documents as well as the cost of parsing. Improvements in the performance of writing (generating) content depends on the speed of the medium being written to, the methods and quality of actual implementations.