I have found the core issue. It's not about kernel update, it's about the fact that Thunderbird package now has usr.bin.thunderbird AppArmor profile, and it conflicted with other profile usr.lib.thunderbird.thunderbird I had enabled earlier (attached).
Kernel upgrade just made me to reboot system and AppArmor tried to load kinda duplicate profiles. I could not reproduce crash on Debian 9 Stretch with duplicate profile.
usr.lib.thunderbird.thunderbird
Description: Binary data
