It’s a known issue, unfortunately.

See the notes for this Aqara/Xiaomi switch: https://www.zigbee2mqtt.io/devices/SP-EUC01.html

They didn’t blow any whistles, the proposal was public and lots of people spoke out against it already.

Besides, I like Vivaldi, but they’re part of the problem.
The only reason this discussion is happening is because everyone and their grandma decided it’s a great idea to re-skin a browser built by an ad-company and expect them not to abuse their position.