Expect moderate lag, no controller support without extra setup, and an authentic early-2000s frame rate. It's not the perfect way to play, but it’s the safe way to play instantly in your browser.
, you can play it through several community-driven methods and enhancements. Ways to Play Online simpsons hit and run online emulator link
If you prefer the original console experience, you can use standalone emulators: Expect moderate lag, no controller support without extra