This is what it says when I try to make a call... Skype calls are temporarily unavailable in Firefox. Your current version of Firefox doesn't support making or receiving calls on Skype for Web. In the meantime, please use a different browser such as Microsoft Edge or Google Chrome.

According to Firefox my browser is updated every time I log on so it can't be that my browser needs updating. What do I do to resolve this problem? I really need to resolve this... Thanks