Attachment #18708
This reproduce the same exception. application/x-zip-compressed 2016-11-29 20:50:25 UTC 70.38 KB no flags Details

Attachment cannot be viewed because its MIME type is not text/*, image/*, or application/vnd.mozilla.*. Download the attachment instead.

Attachment #22860
This is a sample app to demonstrate exception when changing main page application/x-zip-compressed 2017-06-13 15:45:08 UTC 70.96 KB no flags Details

Attachment cannot be viewed because its MIME type is not text/*, image/*, or application/vnd.mozilla.*. Download the attachment instead.