The Steam Deck Client Beta got a very small patch earlier. This one addressed some flatpak bugs and keyboard behavior to make it more responsive for fast typing:

• Fixed a bug where some flatpak applications (like Edge) couldn't successfully quit 
• Fixed some issues with claiming Steam Deck digital rewards 
• Updated keyboard behavior for improved fast typing on trackpad and touchscreen. (pressing a key while holding another key will now commit the held key instead of waiting for first to release)

You can check out the announcement over on Steam. Bug fixes are always welcome! Now let’s switch Firefox over to the Flatpak version!