Squashed commit of the upgrade-to-19 branch (#166)

commit 0498119d80ed648a5a43cd789e2d5574a6a6b6ed
Merge: 70a58ab f9ce999
Author: Garrett LeSage <garrett@lesage.us>
Date:   Sun Feb 24 13:14:54 2013 +0100

    Merge branch 'master' into upgrade-to-19

commit 70a58abca80413663e1ddae08c35c9f345bb958a
Merge: 32c6b2e 71ad11f
Author: Garrett LeSage <garrett@lesage.us>
Date:   Tue Feb 19 22:15:11 2013 +0100

    Merge branch 'master' into upgrade-to-19

commit 32c6b2e5b9da3308cb80a23897487098206de28b
Author: Alexander Seleznev <SeleznevRU@gmail.com>
Date:   Sat Feb 16 23:52:11 2013 +0700

    Fixed icon of the download button (#166)

commit e91268370b74f748e75360f6c117df06040020d5
Author: Garrett LeSage <garrett@lesage.us>
Date:   Sat Feb 16 16:28:02 2013 +0100

    upgraded to Firefox 19 beta 6 (#166)

    Conflicts:
    	theme/chrome/browser/browser.css
    	theme/chrome/browser/devtools/debugger.css
    	theme/chrome/browser/downloads/download-glow.png
    	theme/chrome/browser/downloads/downloads.css