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RE: I suspect the cause is a fatal javascript error

I guess that is it. The following errors appear on the Console tab after I reactivated ROT13:

Uncaught ReferenceError: cnROT13 is not defined

(this error appeared twice).

I have no idea what that means, but I am not worried about it since I don’t need the extension. But for curiosity’s sake I would like to figure it out.