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Which of the following is added to prefs.js,when open a dialog box each time an error occurs?
user_pref("javascript.classic.error_alerts", true);
user_pref("javascript.classic.error_alerts ", false);
user_pref("javascript.console.open_on_error ", false);
user_pref("javascript.console.open_on_error ", true);
Correct Answer:
user_pref("javascript.classic.error_alerts", true);
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