Thunderbird 128.1.0esr takes more than six seconds to open an email or to delete an mail. Thunderbird is totally unresponsive and frozen during this delay time. This is very bad. I have taken all steps to ensure that my installation is not the reason. The previous version of Thunderbird was even worse. This still remains unusable. As the final measure, I even tried 'view message body as plan text' but this did not cut the time either. If the email is opened the first time, this delay occurs. If the same email is re-displayed again later, the delay does not occur. The delay always occurs when deleting an email. Opening the Mozilla email address certification mail from you guys to create a Mozilla account took more than 10 seconds to open and display. I am running Windows 11 in a VERY fast machine. I hope there is a solution; if not I have to find another email software. The delay also happens if Thunderbird is started in the debugging mode (shift-click).