Comment 19 for bug 1981163

1. I expect the pdf file to open with Acrobat Reader DC just like when I receive an email with a pdf file attached.

2. Action is there is a drop down list which includes Adobe Acrobat DC as default, however, pdf document attached while composing email will only display if I set preference for Portable Document (PDF) as Preview in Thunderbird. Before 93.1.1 I was able to open an attached pdf file in an unsent email with Adobe Acrobat DC.