When uploading large files (several MB) through a "file" input type and a POST request, there is no indication of progress of the upload. Feature request: Some sort of acknowledgement that the upload is in progress, and how far it has come.
Adding UI for this is clearly outside the scope of WebKit. I'm not sure whether we have the plumbing in WebKit to notify the application of upload progress so it can display its own UI though.
We do have upload progress events in WebKit. This bug should be filed at https://bugreport.apple.com
OK, filed at https://bugreport.apple.com with id 6657604