You get emails? I don't think Mozilla sends personal emails about Firefox, but maybe you signed up for a newsletter? Can you copy/paste the sender's email address into a reply for reference.

Anyway, you can ignore those messages.

Firefox Sync <Mozilla@e.mozilla.org>

Message is as follows. Uh oh. You’re not syncing to another Firefox yet. You only setup Firefox Sync on desktop but it takes two to tango!

Sign in to another Firefox browser so that you can access your bookmarks and passwords on both your desktop and mobile phone.

Now what do I do? Thanks JUSTJJB

If your Firefox is currently connected to a Firefox/Sync account, try this:

• Windows: "3-bar" menu button (or Tools menu) > Options
• Mac: "3-bar" menu button (or Firefox menu) > Preferences
• Linux: "3-bar" menu button (or Edit menu) > Preferences

In the left column, click Firefox Account (before Firefox 56, click Sync). Then on the right side, click Manage Account.

That should load a page with a category called Communication Preferences and a button labeled Change. Try clicking that and seeing whether you can reduce the email you get related to this account.

A link which might also work, but might require a login: https://accounts.firefox.com/settings/communication_preferences

Thank you Iwill try that,I don't mind the emails they send.I'm just concerned that they make it sound like something may not work if I don't sync a second device. I don't have a second device,not everyone in the world has iphones etc.

Of course! As I said, you can ignore the messages.

They ask "What is the sound of one hand clapping?" Maybe you don't want to hear any clapping.

This is true,thank you for your help. I will ignore any further messages from them.