Careful with the NSS and NSPR updates, reports of instability and the updated NSS breaks some HTTPS sites on FF38 and friends.
After updating my system, I see that the Seamonkey closes very frequently.User agent: Mozilla / 5.0 (OS / 2; Warp 4.5;
rv: 45.0) Gecko / 20100101 Firefox / 45.0 SeaMonkey / 2.42.9esr
Build identifier: 20190601192153
So I decide to change the tcpip, and add in Host name, the ip of my pc with the host name of this computer to host list.
And the number of closures decreases a lot.