Given that we've seen things like Windows take the "you need to create an online account" route, and only a decade ago that would've seemed absolutely absurd, I think your question raises a good point and the downvotes are unjustified.

The only true answer is "not currently". A "not yet" would be too pessimistic, and "never" is too optimistic. If there's one thing that stands out during the past ~decade of software, it's "things are optional... until they aren't."

It isn't. The firefox account features things like sharing your bookmarks/history/etc between devices easily. You don't need to use it to use firefox.

You had to login to use pocket before, what is different now?