How do I know this is running on my phone and my computer?

Hi.

Not clear what you are referring to 'I just downloaded this . . . '

I was told the old Firefox had this as an option you could turn the vpn on and off? I downloaded it also, but I do not see it as an option. Can it be turned on and off? Also don’t see it on my phone, where I thought it would be shared on my devices?

Is there a phone number for customer service ?

The VPN is being rolled out to different localities over time. Maybe your location hasn't got it yet.

"Rolling out to Firefox users

The free built-in VPN is currently rolling out as a beta to Firefox desktop users in the United States, the United Kingdom, Germany and France, with plans to expand to additional countries coming soon over the next several releases."

https://blog.mozilla.org/en/firefox/built-in-vpn/?utm_source=www.firefox.com&utm_medium=referral&utm_campaign=whatsnew-149

https://support.mozilla.org/en-US/kb/built-in-vpn

The built-in VPN is currently only in desktop Firefox. However a built-in VPN is coming in Firefox for Android perhaps as early as Firefox 153.0?