Running Steam (Windows) games on Linux (Fedora) has always been finicky for me. Sometimes requiring digging into logs to figure out what’s going on

Ahh yes, the perpetual slow burn (that sometimes flames up into a much larger fire).

Browser history

Even if the destination doesn’t log GET components, there could be corporate proxies that MITM that might log the URL. Corporate proxies usually present an internally trusted certificate to the client.