Read the lead-in for context, or go to bottom for important privacy and safety feature.
Today I was dragging a file (icon) from one side of my desktop to the other. I happened to have Firefox in the middle of my screen with the Google home page open, and had to drag the file I was moving over top of Firefox to the other side of my desktop. You probably know where this is heading.... Google has a nice feature: the "drag an image here or upload a file" box popped up, which would happily automatically grab my file, upload it to Google, and do a search on it for me. To be fair, this particular Google page would only upload something with a common image extension, not just any file, but you can easily extend this example to any other "drag and drop to upload {any file you like}" scenario on some other website. If I had accidentally released the mouse button over top of Firefox, my file would have inadvertently gone public! It occurred to me that if it was a private picture or any sort of personal information, that I had just done a potentially DANGEROUS thing dragging it over Firefox.
Important feature request for privacy, security, and safety sake...
If possible, please add an option (perhaps defaulted to true), to prompt before uploading a file that is dropped on top of Firefox.
Think: If I were a Black Hat and casting a wide net on click-bait or other sketchy websites, it would be so simple to add this as another "trap" on all of my pages, hoping somebody might fly over with a file in their hand and accidentally dropping it. Ooops!