does VPN service cost?

https://support.mozilla.org/en-US/kb/mobile-android-vpn https://support.mozilla.org/en-US/kb/built-in-vpn The built-in VPN in Firefox for Android and desktop Firefox is free to use. There is a unlimited data usage promotion going from June 9th to August 31st as monthly data usage will be capped at 50GB a month again starting September 1st. It is the standalone subscription based Mozilla VPN that cost money either by annual or monthly payment plans. https://vpn.mozilla.org