UPMetroSkin VS metroskininstaller

Sadly it's part of "Steam going Backwards" program that Steam retired https://developer.valvesoftware.com/wiki/Steam_Skins which https://github.com/redsigma/UPMetroSkin used to use Steam Skin with an OPTION you seek for to remove Big Picture Button from where you pointed out but now it's gone with lots of other good features as of the August "backwards" UI update.

You shouldve just google steam metro fix https://github.com/redsigma/UPMetroSkin and just simply change files

Yeah, it was. That's why I use Metro for Steam (aka MetroUI) with the unofficial patch (still actively maintained and updated).

Just so you know there is an unofficial patch for the Metro skin which fixes all of the issues as well https://github.com/redsigma/UPMetroSkin

New Overlay will only break https://github.com/henrikx/metroskininstaller more as Overlay was skinnable and now will become un-skinnable due to Overlay migration to ElectronUI, except the SteamFriendsPatcher method.

And you dare to ask the Login Name change relying on such thought? No it will Never change but good news for you that Steam is transitioning into ElectonUI so that most of Steam will simply be a HTML page (conversion is almost complete) so some users will figure out to replace your Login name in ElectronUI with your Nickname which currently is AVAILABLE via https://github.com/henrikx/metroskininstaller skin.

To ease your Metro experience for now, use https://github.com/henrikx/metroskininstaller (safe, you can send file to virustotal if you wish) and it will automate the process. I wish you could have seen the glory days of many skins existed because thanks to Valve new policy, as far as I know only Metro still works and others quit fixing their skins.

They aren't working on anything because all of the UI is changed already, Chat, Library, Web pages, Big Picture. Only thing that's there is for Skinning & we don't want it changed. Steam's CEF was never a true replacement for Chrome & I'll urge to read this elsewhere for differences. Steam will never let you "redirect" HTTP/S requests to other browsers like they also don't let you use common OTP apps either & this is purely on Security that nothing you say will ever change this. Overlay browser (CEF) is intentionally in this current state & that won't ever change, no extensions, no Chrome settings, no uBlock Origin, nothing. Valve urges you to use normal Chrome instead.

Your cat knows the best for you so she/he re-organized it optimally ;) Your cat has nothing to do with situation because there are "no" settings anywhere to change the Library view (not left-bar), it's just a coincidence. If you want to try, delete Metro, restart for default skin, re-install metro from scratch.

Use this installer to install the latest patched version: https://github.com/henrikx/metroskininstaller