Try using a more common browser (Chrome, Edge, Safari) and see if that changes anything. When you sign up for a service, access it from Google, not by typing t

Try using a more common browser (Chrome, Edge, Safari) and see if that changes anything. When you sign up for a service, access it from Google, not by typing the address directly. I used the same as you do and would often get my accounts blocked. I suspect the absence of cookies offered by Firefox containers is suspect as well. Now I make sure to create accounts on these big platforms using a "normalized" setup and encounter far less issues.