As per their description supports Chrome, Edge, Safari.
It didn’t work in Firefox first, but not it seems to load the page fine. I guess it was a temporary issue.
With full controller support and a carefully curated game collection, enjoy timeless classics and hidden gems, readily available for instant play in your web browser on devices you already own.
DOS_deck runs seamlessly on Steam Deck, Mac, and Windows using Chrome, Edge or Safari. Whether you prefer playing on a TV or a laptop screen, using a gamepad or mouse and keyboard, DOS_deck adapts to your gaming style.
DOS_deck is built upon the foundation of JS-DOS, which, in turn, relies on DOSBox.
DOS_deck only offers legally distributable games. Each and every game is checked and verified to be either: Shareware, Freeware, Demo, Liberated
https://dosdeck.com
As per their description supports Chrome, Edge, Safari.
It didn’t work in Firefox first, but not it seems to load the page fine. I guess it was a temporary issue.