[inetknght]

You don't even mention Pocket or the stories they put on the default home page.

[slips]

How is that a privacy concern? You can also hide the stories if you don't want to see them.

[autoexec]

Any unwanted, unrequested connections to 3rd parties counts as a privacy concern. If I don't explicitly click a link or enter a URL in the address bar I don't expect traffic to be sent anywhere or any content at all downloaded.

[Kalium]

Mozilla owns Pocket, meaning it's a second party rather than a third. You and others may still choose to regard it as a concern, of course.