While Osiris is a "classic" in the scene, using it on official Valve servers carries a high risk of a or Game Ban . Always use a "vac-bypass" or only use it on non-secure servers if you want to protect your account.
Type a name and click to save your own, or place downloaded .json configs into the Osiris folder in your Documents to see them appear in the list. Risk Warning CSGO Osiris DLL CFG's
In Windows, Osiris typically saves config files in Documents/Osiris or a similar folder created upon the first save. While Osiris is a "classic" in the scene,
danielkrupinski/Osiris: Cross-platform game hack for ... - GitHub CSGO Osiris DLL CFG's