All our users want to do is simply drag a photo from their PC and drop it into their post. Everything else is too difficult (as their eyes glaze over at the "how to" explanation).
Stock feature in v7.6.0, they can drop an image into the "drop an image here" portion of the upload popup; which is seeing extensive updates in v7.6.1 that you can see live here and at
UBBDev.