Thunderbird Printing Problem and pdf.

I have been having real problems with Thunderbird recently which is now trying to do my thinking for me!

When I get a document attachment in email I used to be able to open the document and select which application I used to do this. For a pdf I used to open it with Okular, from which I could print if required.
Now when I try and open a pdf document Thunderbird opens a new window with the pdf opened and a printer icon in the top right seductively asking me to print.
This then gives me an error popup telling me the PDF is not fully loaded for printing and if I accept I get half of the image.

Three questions.
How may I prevent T’bird from opening up a new window without giving me any options.

How may I achieve more quickly than saving as and then going to the file in Dolphin, finding the file and opening it in Okular so I can print.

Should I change my email client to something simpler which is reliable?

Any help would be much appreciated.
Budge.

Settings -> General -> Files & Attachments -> (Content Type PDF) - Action

And select what TB should do.

https://paste.opensuse.org/view/raw/c8867af0

Hi Paul,
Many thanks for rescuing me. So many options these days with little time to investigate and discover. It seems the defaults or what I had been used to changed with the upgrades.
Thanks again,
Alastair.