TNX for the link. LP did to FireFox last night that they did to EDGE and CHROME a few days ago. At least FireFox allows previous extensions to be used.
Not surprising. Friday. Push an update and all the engineers/developers/programmers go home for a long weekend
In fairness, broken release is listed as released on Monday 26. Perhaps it was delayed in Mozilla review process, or the auto-update was throttled.
Workaround works great on all my computers, thank you!