I had the same problem: unable to open pdf attachments. But Thunderbird won't open URLs either.
That lead me to this issue: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/2067092 Removing (all) "handlers.json" files in ~/snap/thunderbird/... solved BOTH ISSUES for me! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/2067340 Title: can't open pdfs Status in thunderbird package in Ubuntu: Confirmed Bug description: If a pdf file is attached to an email message, right-clicking and selecting Open does nothing. In 23.10, clicking an attachment opened a dialog asking to save or view via an app (okular). How do I get it so I can view attachments in this "better" flatpak version of thunderbird? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/2067340/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
