Fireuploader is a Firefox addon that gives you a nice GUI to upload files via your firefox browser.
I have made a special version of the extensions to make it works with the RackSpace Cloud UK.
Install the addon from here :
Allow the website by clicking Allow in the yellow bar on the top as seen in this screenshot :
Click on Install Now and restart Firefox.
After the Firefox browser is restarted you can go in Tools => Fireuploader and choose Rackspace Cloud UK in the dropdown list :
and click on Manage Account :
enter your UK username and UK API Key and “Save Password” if you like and it should log you into your UK Cloud :