Hi, I would like to point out that the drag n drop feature of Firefox is not really good. I have used many linux distribution and faced this problem from the day I started using Linux. I thought Firefox team would notice this, and work on this, so I didn't report any bug. But the problem stayed the same. The Problem: When you try to drag a file from any file manager (I used Nautilus, Nemo, Thunar, Pcmanfm, and Dolphin file managers) on Linux, it will not instantly pop the "Drag files here" on supported websites. For example, when you try to upload files to mega, you have to drag and drop multiple times before getting it working. That doesn't happen with Chromium. Even worse, if you try to drag and drop hundreds of files, Firefox will crash. I have also tried Firefox Nightly and Firefox Beta. Same. No improvement on them. Here I would like to attach a screenshot of the crash.