iOS won't save "blob" files any more

[preidorg]

Hey, thanks so much for this project. I built this based on it: https://github.com/preidorg/overdub

I have been having problems with iOS recently. I think it used to work before... Now when an iPhone user tries to download the blob, they don't get the option to save it. I decided to check if your code also had this problem and it appears it does. See screenshots.

Peter