Sample file showing the issue
Untitled 1.ods (application/vnd.oasis.opendocument.spreadsheet), 9.25 KB, created by m_a_riosv on 2020-06-09 20:13:19 UTC
(hide)
 
Creator: m_a_riosv
Created: 2020-06-09 20:13:19 UTC
Size: 9.25 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 133812: 161817