If you’re looking to manage your website via the browser, without the need for a file editor or FTP client, you should look into ShiftEdit. All your work is done via the browser. No more downloading and uploading files. No more editing offline. Changes are immediate.
ShiftEdit keeps tracks of your file changes as well with Revisions History. You can highlight several files and look at file differences. You can also bookmark files for easy access later. There are more features. Visit ShiftEdit if you’re interested.