Hi there, thank you for posting on the forum! Unfortunately we do not offer phone support but I will be happy to help you here or reach out to you directly via email. Mozilla VPN will cover your whole device regardless of the browser you are using. In general it is also no problem to have security software or anti virus software installed as long as you make sure to allow Mozilla VPN through their Firewall. Please also not: Mozilla VPN is available for desktop, tablet and mobile devices and compatible with these operating systems: Windows 10 (64-bit only) macOS (version 10.14 and up) Android (version 8 and up) iOS (version 12.0 and up) Linux versions: Ubuntu 18.04 LTS (Bionic Beaver) Ubuntu 20.04 LTS (Focal Fossa) Ubuntu 21.04 (Hirsute Hippo) Note: Mozilla VPN is currently not compatible with gaming consoles (such as Playstation or Xbox) and routers.