Try running Thunderbird under strace. It can be told to record only open calls. To get the same environment, you might put something like this in the /usr/bin directory: file pigeon: #!/usr/bin/sh exec strace -o /tmp/strace.out trace=%file thunderbird $* Tweaks by the better-informed are welcome, e.g. does $* need "quotes"? BTW suggesting that OP use another pdf reader or save the file first does not really help. He already knows how to do that. Such suggestions are basically telling him to give up. A friend of mine, whenever I have any trouble at all with my computer, suggests I get a Mac. I find it annoying. -- Michael hennebry@xxxxxxxxxxxxxxxxxxxxxx "Occasionally irrational explanations are required" -- Luke Roman _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue