Hi I upgrade to Thunderbird 78.8.1 in Ubuntu 18.04, and Thunderbird,after some seconds starts to "read the disk" and become very slow. No processor use, but only reading activity, for several minutes,and stop. During this period of reading, everything in Thunderbird becomes slow, and it' difficult to shut down the window... I try in safe mode, but it is the same behavior. I try with other profiles, it is the same... An idea for that? Thank you!