Even if one had all the apps ready, it's hardly doable to get the syncing process done:
1 even if my user name is ready, I have to retrieve the password from the password manager (which is excellent and accessible with a click) and put it in. If Norton Password Managers had a bit more trust, the filling of the password would be automatic... Instead Firefox does not even come to the top row, like all the other websites, even though not at the beginning of the process, in other cases I have to look for it once to get the username and once to get the password.
2 I have to open the Authy app with its pin in order to retrieve its code, choose the right app; a more understanding app usually gives a bit of extra time to the previous code, since codes expires quickly.
3 I have to go to Firefox settings on the phone and get the syncing window out, then click on the QR code
4 I have to get AGAIN the Authy app (open it with the pin as usual, then get the right app on it, then insert the quickly expiring code)
PS: no idea about what you mean by invalid HTML, I had inserted none.
5 by then it's: "Oh, dear ! Something went wrong"
I NEVER managed to sync lately !
