Thunderbird and Ventura
I have just updated from Monterey to Ventura 13.5 on an iMac 2019 19,2. Under Monterey, Thunderbird (Version 102.14) opened very quickly. Under Ventura, the menu bar appears instantly but the remaining opening is slow. I notice that the hang appears to be related to the "Events and Tasks" heading on the menu bar, which is initially absent. This eventually appears and Thunderbird then opens and behaves normally.
Any idea what causes this delay?
iMac 21.5″, macOS 13.5