New SteamOS Beta Fixes FSR Performance Drop, Firefox Freezes

When you’re squeezing 800p frames out of a 15W APU, FSR isn’t a buzzword — it’s the difference between a locked 40 and a stuttering 25. Valve’s latest SteamOS beta patch addresses a bug that degraded the upscaler’s output while also fixing freezes in Firefox, the go-to browser for Deck owners in desktop mode.

It’s a small update on paper, but one that restores trust in two of the handheld’s most-used features.

The FSR Fix That Feels Like a Performance Update

The bug in question seemingly impacted FSR’s performance when upscaling, which on Deck often means lower frame rates exactly when you need the opposite. For a device where every watt counts, a regression in AMD’s upscaler is not cosmetic — it directly affects the 30/40 FPS targets many games aim for. Valve hasn’t disclosed the root cause, but the fix arrives via the beta channel before presumably rolling out to stable. Firefox freezes, meanwhile, have been a complaint in desktop mode, where the Deck doubles as a mini PC for browsing and light productivity.

This patch doesn’t add new features, but stabilizing core functionality is exactly what a handheld OS needs. While beta updates aren’t for the faint of heart, Deck owners running the stable channel can expect these fixes once Valve finishes validation. If you’re seeing FSR-related hitches or Firefox lockups, this beta is worth the risk — or wait for the imminent stable push.