Drop support Firefox 22
Upgrade to Firefox 24.0 beta 3

Conflicts:
	theme/chrome/browser/browser.css
Remove style for windows in "inactive" state
Return support Firefox 23
Remove styles for windows in :-moz-window-inactive state (#198)

Conflicts:
	theme/chrome/browser/browser.css
Merge branch 'upgrade-to-24' (#198)

Conflicts:
	theme/chrome/mozapps/extensions/extensions.css