Which of the following is added to prefs.js when the console is automatically opened during JavaScript error?(a) user_pref(“javascript.console.open_on_error”, true);(b) user_pref(“javascript.console.open_error “, true);(c) user_pref(“javascript.console.open_error “, false);(d) user_pref(” javascript.console.open_on_error”, false);The question was posed to me in homework.My query is from External JavaScript and PHP topic in portion Caching, Debugging and Animation of JavaScript

Which of the following is added to prefs.js when the console is automa

1.	Which of the following is added to prefs.js when the console is automatically opened during JavaScript error?(a) user_pref(“javascript.console.open_on_error”, true);(b) user_pref(“javascript.console.open_error “, true);(c) user_pref(“javascript.console.open_error “, false);(d) user_pref(” javascript.console.open_on_error”, false);The question was posed to me in homework.My query is from External JavaScript and PHP topic in portion Caching, Debugging and Animation of JavaScript
Answer» Correct choice is (a) user_pref(“javascript.console.open_on_error”, true); EXPLANATION: The prefs.js file, located in the profile FOLDER, is used by FIREFOX and other Mozilla-based applications to store settings. For instance, when you create a NEW e-mail account in Thunderbird, the account NAME and server settings will be stored in the prefs.js file in your Thunderbird profile folder. The code :

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