Using the forum on a phone - cannot log-in

Yup, @J0nathan it's private browsing.

The background info:

• Apple implemented a private browsing mode that is very strict
  
• It is so strict it prevents Persona from working
  
• Safari uses this on the iPhone if enabled
  
  

So if all of the above apply... turn off private browsing to get into LFGSS.

The more interesting part:

• Apple prohibit anyone else from shipping their own browser engine
  
• On iOS devices Chrome and Firefox are forced to use a WebView and to wrap Safari
  
  

Which essentially means, all browsers on iPhone are affected by the same global setting for private browsing, and all browsers including Chrome and Firefox will not sign-in to LFGSS if private browsing is enabled in the iOS device.

To disable: https://support.apple.com/en-gb/HT203036