Sites like Newgrounds or dedicated Flash archives often use Ruffle automatically. If you find a link to the game on an older "Arcade" site, check if they mention Ruffle support.
to run Flash content in-browser. You can find many of these entries on community-driven sites like Internet Archive bleach circle eden 6 flash game link
Bleach Circle Eden (also known as Mayuri-sama no Jintai Jikkenshitsu ) is a series of fan-made Flash games based on the Bleach anime and manga, primarily focusing on character interactions and experimentation scenarios. Version 6 is often sought after as an expanded iteration of the popular 5.5 release. Game Overview and Features Sites like Newgrounds or dedicated Flash archives often