Some examples using such format
SampleFormats.ods (application/vnd.oasis.opendocument.spreadsheet), 14.06 KB, created by Laurent Balland on 2019-08-16 17:08:12 UTC
(hide)
 
Creator: Laurent Balland
Created: 2019-08-16 17:08:12 UTC
Size: 14.06 KB

Attachment is not viewable in your browser because its MIME type (application/vnd.oasis.opendocument.spreadsheet) is not one that your browser is able to display.

Download the attachment.

Actions: View
Attachments on bug 118345: 153443