Gmail uses Flash (Adblock shows block Flash thingie). ---- Edit: upon further inspection, it seems Gmail indeed does use Flash [1], just for a different part

Gmail uses Flash (Adblock shows block Flash thingie). ---- Edit: upon further inspection, it seems Gmail indeed does use Flash [1], just for a different part of the upload process (progress bar?). Drag and drop is only supported in Chrome and Firefox [2], so I suppose this is HTML5. [1] https://mail.google.com/mail/uploader/uploaderapi2.swf https://mail.google.com/mail/uploader/uploaderapi2.swf [2] http://gmailblog.blogspot.com/2010/04/drag-and-drop-attachments-onto-messages.html http://gmailblog.blogspot.com/2010/04/drag-and-drop-attachme...