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Cannot choose Document Viewer to open PDF attachment

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Using Thunderbird 60.3.0 on Ubuntu 18.04. When I click on a PDF attachment and select "Open with", it suggests to use LibreOffice Draw. I choose "Other" but I cannot see Document Viewer amongst the available applications. How can I debug this? Please note PDF files open correctly in operating system (e.g. after saving them to desktop).

Using Thunderbird 60.3.0 on Ubuntu 18.04. When I click on a PDF attachment and select "Open with", it suggests to use LibreOffice Draw. I choose "Other" but I cannot see Document Viewer amongst the available applications. How can I debug this? Please note PDF files open correctly in operating system (e.g. after saving them to desktop).

Solución elegida

Sorry the problem was elsewhere... just discovered I was using an outdated snap version, as soon as I removed it and install from apt everything went back to normal.

Thank you!

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In the window that you see when clicking Other, that doesn't show Document Viewer in the list of available apps, is there not a Browse... button to manually select the proper app?

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Solución elegida

Sorry the problem was elsewhere... just discovered I was using an outdated snap version, as soon as I removed it and install from apt everything went back to normal.

Thank you!