Nope. Ublock Origin is the only plugin I use. It’s not a regular thing anyway. The loading problem that is. I’ve only had very intermittent success with Chromecasting within Firefox. It just doesn’t work most of the time. That is most likely due to Chromecast being tied to whatever remains of Google Home.
Sexy Parodius is a bit sketchy, yes. But, it’s easily the most-fun shmup I’ve ever played. The music is fantastic, too. I’ve managed to 1cc the game, but I’ve never beaten the bonus stage which is just so ridiculously difficult, I question whether it’s even possible without a very specific strategy or something.
Unfortunately, the best version is the arcade one, and MAME doesn’t do the best job with it. Still playable, though.