There seems to be a similar bug the other way around: https://askubuntu.com/questions/1426478/snap-firefox-is-already-running- but-is-not-responding
-- 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/1980839 Title: thunderbird -compose returns error since the 102 snap update? Status in thunderbird package in Ubuntu: Confirmed Bug description: After updating to the latest thunderbird 102.0.1 snap on Ubuntu 20.04, it is no longer possible to open mailto links from the firefox snap in thunderbird. When clicking a mailto link in the firefox 102.0.1 snap, thunderbird returns the following error message: "Thunderbird is already running, but is not responding. To use Thunderbird, you must first close the existing Thunderbird process, restart your device, or use a different profile." The issue appears related to the thunderbird update as there was no issue opening links in the previous 91 version. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1980839/+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