https://support.mozilla.org/en-US/kb/mozilla-vpn-compatible-my-device <blockquote>Mozilla VPN is available for desktop, tablet and mobile devices and compatible with these operating systems: Windows 10 and Windows 11 (64-bit only) Windows 10 ARM and Windows 11 ARM macOS (version 13 and up) Android (version 9 and up) iOS (version 15 and up) iPadOS (version 14 and up) Linux distributions: Ubuntu 22.04 LTS (Jammy Jellyfish) Ubuntu 24.04 LTS (Noble Numbat) Ubuntu 24.10 (Oracular Oriole)</blockquote> If you are referring to the built-in VPN in Firefox 149.0 and later then it is only in desktop Firefox for Windows, macOS, Linux. https://support.mozilla.org/en-US/kb/built-in-vpn