от Realraven (Axel Grude) (Разработчик) на Июль 25, 2022 · permalink

thank you for your feedback! If you are running Thunderbird , 102, please try version 5.11 it addresses a lot of the performance issues that were recently introduced. Generally Thunderbird does take quite a longer when we have many folders in the tree, so there will be more scope for improvement. Especially starting Thunderbird and installing a new version of the Add-on can lead to some unique delays that may coincidentally make it seem the history is slowing things down - but it is actually the initialization of the folder tree, which is currently a little inefficient in Tb102.