Just checked and the browse button doesn't work anywhere.

If you have already added a game before updating, try opening the properties for the game and click Browse. That doesn't work either

Also having this problem, is there any workaround to add a non-steam game?

Having this issue on SteamOs 3.5 as part of the main channel for updates.

Works for me on latest beta. Fedora 38, Gnome, X11, Nvidia.

Steam Version:  1685572056
Steam Client Build Date:  Wed, May 31 23:57 UTC -08:00
Steam Web Build Date:  Wed, May 31 22:00 UTC -08:00
Steam API Version:  SteamClient020

Doesn't work for me:

Your system information

• Steam client version: 1685572056, Wed, May 31 10:57 PM UTC -08:00
• Distribution (e.g. Ubuntu): Arch Linux
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes

• WM: sway

I am encountering this issue. But contrary to @NoGoat, the browse button works and opens nautilus when I browse installed files for a game. It just does nothing for "add a Non-Steam game".

My system information
Steam client version (build number or date): 1685572056
Distribution: Arch
Opted into Steam client beta?: Yes
Have you checked for system updates?: Yes
DE: GNOME 44.1
WM: Mutter

Ditto, button does nothing. @XimTheCookie I did figure out how to cheese it by creating a new menu shortcut in my DE pointing to the .exe (exo-desktop-item-edit --create-new ~/.local/share/applications). Steam then puts it in the list of programs it detects when you go to add a non-Steam game so that you don't need to browse for it. After adding it, I deleted the new .desktop file in .local/share/applications.

• Steam client version (build number or date): 1685664179
• Distribution (e.g. Ubuntu): Arch
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes

Still doesn't work for me and was also pushed to the non beta. So there is now no way of adding non-steam games to steam unless you use sbarracks workaround:

Your system information

• Steam client version: 1686779606, Wed, Jun 14 9:18 PM UTC -08:00
• Distribution: Arch Linux
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes
• WM: sway

@kisak-valve here is the gist.

xdg-desktop-portal-wlr is already installed on my system.

@kisak-valve it looks like xdg-desktop-portal-wlr doesn't have a file chooser which is why its not working. wiki.archlinux link to "List of backends and interfaces"

Just retried, it now gets a little further on current beta, but still is unusable...

Steam Version: 1686880776
Steam Client Build Date: Fri, Jun 16 03:41 UTC -08:00
Steam Web Build Date: Fri, Jun 16 03:10 UTC -08:00
Steam API Version: SteamClient020

If I click the + button in Settings/Storage the file chooser opens and it is possible to select a directory.
Unfortunately, steam seems to be unable to access the games stored there (I already used that directory previously via flatpak override so the games are definitely installed in that directory).
I tried opening the steam flatpak in the terminal and got the following error log

flock /run/user/60318/doc/8cc75243/SteamLibrary/libraryfolder.vdf LOCK_SH failed. errno = 38
CAppInfoCacheReadFromDiskThread took 128 milliseconds to initialize
Failed to init SteamVR because it isn't installed
flock /run/user/60318/doc/8cc75243/SteamLibrary/steamapps/appmanifest_1054830.acf LOCK_SH failed. errno = 38
flock /run/user/60318/doc/8cc75243/SteamLibrary/steamapps/appmanifest_11450.acf LOCK_SH failed. errno = 38
flock /run/user/60318/doc/8cc75243/SteamLibrary/steamapps/appmanifest_1245040.acf LOCK_SH failed. errno = 38
flock /run/user/60318/doc/8cc75243/SteamLibrary/steamapps/appmanifest_1255980.acf LOCK_SH failed. errno = 38
flock /run/user/60318/doc/8cc75243/SteamLibrary/steamapps/appmanifest_12710.acf LOCK_SH failed. errno = 38
.
.
.

Note: truncated output for just a few selected app ids, since it always seems to be LOCK_SH failed. errno = 38.
Let me know if I can provide you with any more useful data about the issue.

I have this problem too, when i click browse nothing works, not even a pop up.
Running on arch Linux, system up to date, steam version 1686880776

Had the same issue, installing the "xdg-desktop-portal" package solved it, a bit weird that it used to work fine before

Hello @ZeroKun265, if clicking browse doesn't open a dialog, that means that xdg-desktop-portal isn't in a working configuration. #9584 is tracking the lack of fallback in that scenario.

But i have xdg-desktop-portal-kde inatalled..

@kisak-valve Here is Gist with the same issue on hyprland, wayland, Arch....
https://gist.github.com/MatthewJPretty/efdfed22ccfb2cecd397d9aed3f1a4ed

I know that update was bad but now this..?

is there any workaround to add a non-steam game?

@XimTheCookie: This works for me - https://steamcommunity.com/app/221410/discussions/0/365172547938643895/#c6717729343884776040

It does seem this is an issue of dependencies and nothing else.
xdg-desktop-portal should be added as a dependency on all package managers for steam, as highlighted in this post on the arch bug reporter.

https://bugs.archlinux.org/task/78625?project=5&string=steam

Can confirm that on Arch, all i had to do is install xdg-desktop-portal.

sudo pacman -S xdg-desktop-portal

After installing, you can browse from steam client like normal (no need to restart PC or Steam)

System Info:
Steam Version: 1687386907
Distribution: Arch Linux
Kernal: 6.3.9
DE: KDE Plasma (5.27.6)
WM: KWin

Can also confirm on Arch
I just install it and restart Steam
sudo pacman -S xdg-desktop-portal

System Info:
Steam Version: 1687386907
Distribution: Arch Linux
Kernal: 6.3.9-zen1-1-zen
DE: KDE Plasma 5.27.6
WM: KWin

I have xdg-desktop-portal downloaded on Arch and it doesn't work. You may have xdg-desktop-portal-kde installed which is why it works.

https://wiki.archlinux.org/title/XDG_Desktop_Portal#List_of_backends_and_interfaces

I noticed that the file picker in the context of choosing library locations (substituted with library_folder_add) now falls back to the VGUI dialogue, can you please assign the fallback to other contexts too (Chat, non-Steam game selector, web browsing)?

I hesitate using desktop portals just because Steam felt like going fancy, and there's no loss in using what's already there if the desktop portal dependency is not met.

I am running EndeavourOS with KDE Plasma.

I had installed xdg-desktop-portal-kde and it didn't work. Installing xdg-desktop-portal allowed me to finally get it to work (without running steam with the old UI)

I am running EndeavourOS with KDE Plasma.

I had installed xdg-desktop-portal-kde and it didn't work. Installing xdg-desktop-portal allowed me to finally get it to work (without running steam with the old UI)

That's because xdg-desktop-portal-kde is required by xdg-desktop-portal. If you just have one of them it won't work, you need both. Any backend with a file chooser + xdg-desktop-portal will make it work.

https://wiki.archlinux.org/title/XDG_Desktop_Portal#List_of_backends_and_interfaces

I think I have a slightly different problem at hand:

Since quite a few years I am using the steam flatpak from flathub.
Due to my home directory being on a rather small drive I added the following override:

[Context]
filesystems=/mnt/media/SteamLibrary

when the portal support was activated in beta I hoped I could remove this override and just reselect the given directory, unfortunately this does not seem to be the case.
Re-enabling this override fixes the library access, although, since I am syncing all my overrides between my machines, I would really love to get rid of it

Browse button happily works on x11, but picking anything will NOT put it in the list. it's impossible to add a non-steam game.

"> Had the same issue, installing the "xdg-desktop-portal" package solved it, a bit weird that it used to work fine before"

Installing this pack and xdg-desktop-portal-wlr worked for me on Steam 1698777785 on Ubuntu 22.04 fresh install, it also seems that you cant click on the selected library to make it default if you click outside of the pixels of the letters in the label.

I'm on Arch, using sway, and I have both xdg-desktop-portal and xdg-desktop-portal-wlr installed, and the "Browse" button still does nothing.

encountered the same issue:

Steam Version: 1769025840-stable
Distribution: d77void-linux
Kernal: 6.19.5_1
WM: niri using the dms shell

could not find a solution but i did find a way around it. all i did is choose one of the listed apps and edited it manually to point it to my game