Nav extension is associated with Msn application add on. You have chance to open nav files with Microsoft Msn.
Nav extension stands for add on files. This file format brings in new features to Msn software. According to Msn version, if you put these in proper folder, they will work on your computer. It is not possible to open them directly. To get detailed information, please check the following link below.
What to use nav
which page related to nav file
nav Related Searches
You can check related links about nav fileextension.