I've been using Outlook 2010 with the Google Apps Outlook sync add-in. I noticed today that I have 3 new labels in Gmail, "Conversation Action Settings," New Feed," and "Quick Step Settings." None contain email messages.
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Gmail Space is a nifty extension for Firefox that makes your gmail account looks like a FTP host. You can upload and download files from within Firefox.
I love Gmail Drive, but this extension works with Portable Firefox. Gmail Space a little buggy, but it’s snazzy.