Just type the following bold statements in address bar(where you type http://amanrulesit.blogspot.com) of your Mozilla Firefox.

chrome://browser/content/browser.xul
-->IT Opens another Firefox inside a tab in the the existing Firefox window.

chrome://browser/content/preferences/preferences.xul
-->IT Opens the Options dialog box inside the Firefox tab.

chrome://browser/content/bookmarks/bookmarksPanel.xul
-->IT Opens the “Book Marks Manager” inside a tab in the Firefox window.

chrome://browser/content/history/history-panel.xul
-->IT Opens the History Panel in the Firefox tab.

chrome://mozapps/content/extensions/extensions.xul?type=extensions
-->IT Opens the Extensions window in the current tab.

chrome://browser/content/preferences/cookies.xul
-->IT Opens the “cookies window” inside a tab in the Firefox window.

chrome://browser/content/preferences/sanitize.xul
-->IT Opens the “Clear Private Data” window inside the current tab.

chrome://browser/content/aboutDialog.xul
-->IT Opens the “About Firefox” Dialog box inside the tab.

chrome://browser/content/credits.xhtml
-->IT A scrolling list of names. The one’s who we must thank for creating Firefox

chrome://global/content/alerts/alert.xul
-->IT Shows Dancing Firefox.

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