hi, My application which is a voice messaging solution, takes a wav file from the desktop , upload it to the server then send it to the other user. The problem i am facing is: firefox 20 onwards , browser takes the .wav file from the desktop , uploads it to server, but after uploading it is not able to send it to user. I analyzed the request my application is sending, i found that the content size comes out to be 0. Content only contains the file name and the wav file. I checked the release notes of firefox 20 also, which says there were few enhancements and features were introduced in this release. Also there was a bug regarding the UNC path which was resolved in firefox 20. Can anyone please tell me, what i might be missing here. Or is there any change regarding the wav files or how files are accessed .