Ouch, can confirm what the prior commenter said. Firefox stable is now failing to start on all our machines as well... I was trying to update to check a coworker's report that ever since Firefox 72.0.1 we were now hitting bug #1590870 on all our machines and thus a few thousand firefox users SSL had stopped functioning with no workaround (due to the about:config block). But, yeah, I now have no firefox that works at all. Could you describe how to setup the workaround above? Thanks.
Bug 1604008 Comment 38 Edit History
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[removed incorrect comment about stable - jumped to conclusions after firefox did not launch first couple of times I doubleclicked the icon]