 I found a bug in firefox just started today...
 https://paste.ubuntu.com/p/9Vp59NCGPF/
 after discoverer updates today...firefox crashes plasma...see https://paste.ubuntu.com/p/9Vp59NCGPF/
 when I try ubuntu-bug firefox...again plasma crashes
 maybe I need to change my  default browser to opera and try ubuntu-bug again...
 I changed my browser to opera...
 and still, got a crash in plasma