Yes, once you remove FRP using the SamFW FRP Tool 3.1, it is permanent. You can re-enable FRP if needed through the device settings.
SamFW is not officially distributed through mainstream channels like the Google Play Store or Microsoft Store. It is typically hosted on third-party file-hosting sites (Mega, MediaFire) or forums. samfw frp tool 3.1 - remove samsung frp one click download
Because it uses scripts to modify device settings, some antivirus programs may flag it as a virus. The developer states these are "false positives" and that it is safe to use if downloaded from a trusted source like SamFw.com . Yes, once you remove FRP using the SamFW FRP Tool 3