There is one legal, legitimate way to play PS3 games in a browser via a : PlayStation Plus Premium (formerly PS Now). Sony streams PS3 games from real PS3 hardware or server blades directly to your browser.
: Any website claiming to play PS3 games directly in a browser window without a download is likely a scam or a cloud-gaming service (like PlayStation Plus on PC) rather than a true emulator. recommended settings for a specific game you're trying to play? PS3 Emulator RPCS3 Setup Guide ps3 emulator on browser link