Drag and Drop issue using Firefox
I made a quiz site for kids. It contains only images and dropzones.
The problem is when i want to move an image to the dropzone i need to click twice.
With Google Chrome it works fine.
A video about the problem: https://drive.google.com/open?id=19mMOS4K8Tgd_PC9zbg7kav7I5SOLxiLJ
Excuse my English!