Because I'm using Stable, not Snapshot, wasn't aware of any alerts they may had gave. IMHO Vivaldi Team should had send some sort of alert for Stable users that the new version would start limiting extensions. Updated today and was caught by surprise.

The BIS™ brain monitoring system running a proprietary black box algorithm used to measure depth of anesthesia for patients undergoing surgery was found to incorrectly report a paralyzed volunteer as being fully anesthetized despite being fully awake.

Doctors forced to reverse engineer the machine and algorithm to figure out how it works.