My office recently adopted SharePoint to replace our VM Ware servers for storing shared data. My colleagues are able to drag and drop email attachments and files from FileExplorer into SharePoint, but I cannot. Finally I realized they use Chrome, Edge, Explorer and other browsers and this functionality works fine. It's only Firefox where it does not. Is there an add on, extension or setting to address the shortcoming. I love Firefox, but if it cannot drag and drop to SharePoint like every other browser does, I will be compelled to (reluctantly and regrettably) make a switch. Please help!