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Thunderbird is not fully opening up on my macOS
Thunderbird is installed on an iMac Retina 5K, 27" 2019 computer running macOS 15.7.6, but just this week, when it starts, it only opens a window with tabs and does not finish opening the app. The window shows the tabs, but they just have a bouncing dot from right to left, and anywhere I move the mouse on the window's control bar, I get a swirling color wheel. I restarted the Mac (no change), deleted the app and downloaded a new one, and nothing changed. Force Quit says it's 'not responding'. What do I do next?
Thunderbird is installed on an iMac Retina 5K, 27" 2019 computer running macOS 15.7.6, but just this week, when it starts, it only opens a window with tabs and does not finish opening the app. The window shows the tabs, but they just have a bouncing dot from right to left, and anywhere I move the mouse on the window's control bar, I get a swirling color wheel.
I restarted the Mac (no change), deleted the app and downloaded a new one, and nothing changed.
Force Quit says it's 'not responding'.
What do I do next?