Upgrade to Firefox 29.0 beta 4

Conflicts:
	theme/chrome/browser/browser.css
	theme/chrome/browser/newtab/newTab.css
	theme/chrome/browser/tabview/tabview.css
	theme/chrome/global/alerts/alert.css
	theme/chrome/global/findBar.css
	theme/chrome/global/global.css
	theme/chrome/global/notification.css
Replace "tab-close" filter to sepparate image