.STSKIN File Extension
What is an STSKIN file?
An STSKIN file is a skin file created by Steam Customizer, an app used to customize the skin of the Steam program. It contains UI styles for client, friends, and dialog panes in Steam which include fonts, primary and secondary text colors, inbox colors, search field background appearances, and any imported logos.
Steam Customizer allows users to manage their Steam skins, enabling them to open and customize STSKIN files. Users can add skins to Steam through the Steam Customizer website or can download them and install them using the Steam Customizer application.