This is an intentional change. As part of a larger refactor of our search UI, we removed the non-default (and unsupported) non-handoff mode from the search input on New Tab. This is letting us clean up the surrounding code (which had deep tendrils into New Tab) so that the Search team can work on and eventually land in an inline search experience later this year which will replace the current handoff mode. See https://bugzilla.mozilla.org/show_bug.cgi?id=1999334#c1 and https://bugzilla.mozilla.org/show_bug.cgi?id=1999334#c5 for more details. It's better to use the search bar now -> [[Add the Search bar to your Firefox toolbar]].

有難う御座いました。