For a long time, I once again Ubuntu installed on my notebook. as it looks so I'll remain here, because with Windows 7 , the notebook, unfortunately one or the other driver problem. Unfortunately was only built for Windows Vista and I do not necessarily want to use.
Thanks to the Cloud I does require a browser, and the drop box did not work to my laptop around with.
You need only the commands shown here in the terminal with root privileges to run and already, the version of Firefox 4.0. It is this another repository, "Firefox Stable" is added from which installs the new version then.