Your system information

• Steam client version (build number or date): 1754956157
• Distribution (e.g. Ubuntu): Fedora 42 using Flatpak Steam
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: steam-logs.tar.gz
• GPU: AMD Radeon RX 6500 XT

Please describe your issue in as much detail as possible:

as documented in https://developer.valvesoftware.com/wiki/Steam_browser_protocol, the app should be launched with the provided parameters. this does not happen.

Steps for reproducing this issue:

1. ensure Half-Life is installed and does not have any launch options
2. copy & paste this link into a new tab: steam://run/70//-novid/
3. observe the intro movie still playing