Just Type the things written in Bold in new tab, to see the effect.

1.chrome://global/content/alerts/alert.xul
IT SHOWS Dancing Firefox.

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

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

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

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

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

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

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

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

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

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