Every time you want to open or upload something to Google Docs, you have to first navigate to Google Docs, log in, find what you’re looking for - or navigate to the upload section. Well, not with the handy, free Firefox plugin Google Docs Bar!
The extension has many features from Google's file explorer: you can search for a file, restrict the list to documents, spreadsheets or presentations and view a certain folder
A great feature that makes this extension more valuable is uploading files using drag and drop. Drag one or more files from Windows Explorer to the sidebar and they'll be uploaded in the background.