I was not able to find one, but this js snippet: > https://gist.github.com/capfsb/3fd1b700b4732debb29aefd576cf54ef https://gist.github.com/capfsb/3fd1b700b4732

I was not able to find one, but this js snippet: > https://gist.github.com/capfsb/3fd1b700b4732debb29aefd576cf54ef https://gist.github.com/capfsb/3fd1b700b4732debb29aefd576cf5... correctly reports 240hz for me. The fun thing is that 240 makes everything too slow, whereas 120 works fine.