I use AirMail for iOS as my email client on my iPhone5s running iOS 10.1.1 It allows me to choose which browser will open content from emails. I subscribe to a number of forums and links are sent to me in emails for updates and questions. I have set the default browser as Firefox but when I click on a link although Firefox opens and I briefly see the address in the address bar it then becomes a blank page with an empty address bar. Each time I click the link Firefox creates another blank page. I have uninstalled my old version of Firefox and installed the latest iOS version, Airmail is also up to date. I have tried making other browsers such as Safari and Chrome the default for AirMail and they all open attachments/links with no problems. I am sure this used to work in the past and as I am now using Firefox as my default desktop browser I would like to be able to use the iOS version on my iPhone but if I cannot open links from emails it creates a real nuisance.