I sympathise with dear and conflicted layfolk who wonder, in view of the preposterous publication in AAS of a certain letter, whether PF has finally stepped across a certain line and through manifest heresy forfeited the Petrine See.
The answer is
(2) No; and
To suffer canonical consequences for formal heresy, formal canonical procedures, including formal pertinacity after formal warnings, would be necessary.
There is nowhere you can buy a DIY 'deposeapope' kit.
If God spares me until tomorrow morning, I shall as usual say una cum famulo tuo papa nostro Francisco in the Te igitur, bowing my head as I do so.
Sedevacantist comments are never, you will remember, enabled on this blog.
Talk about PF no longer being pope is an easy way out of a very horrible problem. It is a characteristic temptation of the Enemy. You must realise that the Enemy is terribly active at the moment.
I beg you in the Holy Name of our Redeemer to forget it.