smplayer always crashes in Debian 12, bookworm

I have a PC. I installed Debian 12, amd64, on my machine. Smplayer always crashes. The log file contains many X11 error messages. I have attached the log file. log.bin Description: Binary data

Firefox: Some buttons on mozilla web pages do nothing when pressed

I use Firefox 60.8.0esr-1~deb10 which is a package in Debian 10.0 (stable). I have had the following problems with Firefox for several days. The following problem suddenly went away today. I did not do anything. But History Cleaner was last updated on August 9, 2019. Today! I go to the