Why is Firefox crashing so much lately?

[Gary Dale <gary@extremeground.com>]

I'm running Debian/Trixie on an AMD64 system, using the Plasma 5 over X 
desktop. Firefox 115.12.0esr is crashing multiple times per day. It 
frequently happens when page I'm transfers to another page that creates 
a PDF or just has a complicated link. It's annoying.

To visit some pages, I have to use Chromium instead.  Earlier today I 
had to rename a sessionstore-backups json file because Firefox got 
caught in loop where it recognized it had a new tab open but the tab 
caused it to crash.

I also have found that at least one site refuses to work with 115. 
That's been going on for a while. Again, I have to use Chromium for that 
site.