Margin top not working in FF

Margin top not working in FF

References

Reference NO 1

http://stackoverflow.com/questions/15070666/firefox-top-margin-0-not-working

Reference NO 2

http://stackoverflow.com/questions/9919250/top-margin-removable-in-safari-but-not-firefox

Reference NO 3

http://csscreator.com/node/31243

Reference NO 4

http://www.geekstogo.com/forum/topic/187767-css-margin-attributes-not-working-in-firefox/

Reference NO 5

http://www.dynamicdrive.com/forums/showthread.php?22960-Remove-Top-Margin-in-FireFox-not-working

Reference NO 6

http://forums.htmlhelp.com/index.php?showtopic=11328

Reference NO 7

http://www.webdeveloper.com/forum/showthread.php?111224-margin-top-Firefox-BUG

Reference NO 8

http://www.sitepoint.com/forums/showthread.php?732775-top-margin-not-working-with-clear-both-in-firefox