Comment 44 for bug 1981163

I came to report this bug but found it is already here.

I am on linux (Pop!_OS 22.04 LTS) and am using Thunderbird 102.2.2, although this was also present in version 91 (I only upgraded recently).

I have Thunderbird set to use the system PDF application (in this case Evince) for reading PDF files, which works perfectly for reading messages sent to me.

However, when I attach a PDF document to an email and try to open it to check something, it only gives me the option for Firefox. Fortunately, Firefox can display PDF files but it is not the behaviour I expected.Thanks for digging into it.