After I noticed Firefox has removed the Pocket branding but kept the Pocket stories, I also noticed the settings screen on the homepage no longer lets you disable sponsored stories or links.
Firefox 115:
Firefox 139:
You can still remove these advertisements, but you have to leave the homepage and dig through the settings to find that option.
You'll be happy to hear that they're killing off Pocket
Not really, because the service is dead but Sponsored Stories (now going by a generic name) remain