Built from the pret/pokefirered decompilation, running on a WebAssembly build of mGBA's core.
Your ROM stays on this device. It is read into memory by the
browser's own file reader and kept in this page's local storage so you don't have to pick it
again. This page is static files with no server behind it, and its Content-Security-Policy
sets connect-src 'none' — the browser itself refuses to let the page make
any network request at all.