updates of all kinds, for whatever the program have caused me more problems and down time than any virus ever has. i put off restarting thunderbird and edge for weeks or maybe months for fear of a failure. i dropped my guard for just a moment and accidentally allowed a restart and sure enough it now appears that thunderbird is fatally flawed. before the update it worked perfectly. God only knows what it will take to get it working again. i'm tired of fooling with fixes that don't work so if mozilla doesn't fix it i will have to move on to something that does work. if it ain't broke, please don't fix it.