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When they "record every keystroke", do they mean: a) every keystroke on that particular webpage? b) every keystroke of any webpage on any tab of the browser? c) every keystroke on the laptop itself?

If it's b or c, I have a MAJOR problem with this.

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It's referring to scenario A, since the code only runs on that webpage (or any others with it).

Assuming no bugs in the browser's same-origin implementation.

B and C are not possible, it's talking only about scenario A.

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