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Please do read it again. They've not disabled any extension on any website. They've added a option for that to potentially do that.

Sorry, but they really remotely can (and will) disable any "not approved" extension on any website that they want.

Upd:

> We need to have ability to set the list of quarantined domains remotely.

The disagreement was not over the capability but with your claim that it's already being used ("They started disabling extensions...").