Friend List & Chat skin installation guide
1 - Download the friendlist&chatprealpha0.1.zip
2 - Download Steam Friends Patcher (SFP) from GitHub - PhantomGamers/SFP: This utility is designed to allow you to apply themes to the modern Steam friends and library interfaces. & follow the instructions of git (Github).
3 - Open SFP_UI.exe, click Patch (with steam open) then restart steam.
4. After patching steam with SFP, unzip "friendlist&chatprealpha0.1.zip" into the Steam/clientui directory and replace it.
5.Make sure you have the compact mode of friends and favorites list in compact mode
