What I am trying to do is to open a link in the WhatsApp web app, it works in Chrome but in FF and IE, doesn't.Firefox:this is the link https://api.whatsapp.com/send?phone=359883378007, when the link loads it beign redirected to this link whatsapp://send/?phone=359883378007Internet Explorer 11- when I try to open the link in IE11 I am asked to allow an app to be opened 
WhatsApp link with phone number doesn't open WhatsApp's web app
whatsapp