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kotlinlang

Hello! I have been experimenting with using Kotlin for Firefox WebExtensions and I think I found a bug in Koltin/JS.

In Firefox WebExtensions content scripts run in a separate global, which means in particular that `Object !== window.Object` (see <https://bugzilla.mozilla.org/show_bug.cgi?id=1523139>). Kotlin does not seem to respect this fact, which, among other things,  results in `document is Any == false` (because `document instanceof window.Object === true` and `document instanceof Object === false`). This obviously leads to many further errors.

Is this considered a bug or is it intended behaviour and is there a workaround for this problem?