Oceniono na 4 z 5 możliwych gwiazdek

what would be the syntax to open a pdf reader on the attachment?

Oceniono na 5 z 5 możliwych gwiazdek

Does exactly what I need. I wrote a wrapper for handling files with a special content, now I can call that wrapper directly with 2 clicks. Thanks! :-)

Ta opinia jest o wcześniejszej wersji dodatku (0.9.0). 

Oceniono na 5 z 5 możliwych gwiazdek

Works great. I regularly receive .DAT files (text files) and Thunderbird didn't know what to do with them.

This extension opened them up in Notepad, right from the mail interface.

Ta opinia jest o wcześniejszej wersji dodatku (0.9.0). 

Thanks for using.

By the way, since Thunderbird 91.4.1, you can directly open ".DAT" files or such with correct viewer.

Check TB release notes from:
https://www.thunderbird.net/en-US/thunderbird/91.4.1/releasenotes/

> Temporary files created for forwarded attachments sometimes had the wrong extension