The .mno file extension is most commonly associated with the Adobe Dreamweaver software application. The MNO files contain text files that store information about an associated Internet document that has been created in the Dreamweaver application. The MNO files contain a variety of information such as details about the file type, document name and author of the file. These files are saved in XML format.
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If you have additional information about the MNO file format or software that uses files with the MNO suffix, please do get in touch - we would love hearing from you.