[wojciechpolak]

Today I tried it for the first time (the web version) on my work laptop T490 (Intel UHD 620), Ubuntu with Firefox 73. Everything is super smooth. I'm surprised it isn't for you. It's also smooth on my home Macbook Pro (2015) w/ Fx73.

[markdog12]

I'm surprised too. I've tried on Firefox as well, and on different machines, dual core laptop (Intel), quad core laptop (Intel), iMac 27" Late 2015. All were silky smooth with NACL.