Games really shouldn't be launching system apps, so this is only really an issue when games (such as Planetary Annihilation) try to open links in a web browser. To fix this the steam runtime should include a xdg-open wrapper that disables the runtime (by clearing the changes made to the LD_PRELOAD environment variable).
Hello @aldrik, the steam runtime has changed to prefer newer system libraries over the runtime variants by default. Are you still experiencing issues with xdg-open on an up to date system?
Games really shouldn't be launching system apps, so this is only really an issue when games (such as Planetary Annihilation) try to open links in a web browser. To fix this the steam runtime should include a xdg-open wrapper that disables the runtime (by clearing the changes made to the LD_PRELOAD environment variable).