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Yeah, this made my whole browser lag (buttons-shading-five-seconds-after-hover-level lag).

FireFox Quantum on Windows 10 with a pretty badass CPU. Also slow in Opera. Also slow in Vivaldi.

And it crashed Chrome Canary.

For a web-tech post, this is pretty fucking bad.

Works fine for me in Chrome stable on Linux, Mac, Windows and Safari iOS, Mac.

I also tried scrolling a number of different ways - with autoscrolling, mousewheel, page up/down and arrow keys.

All of the machines I tried it on are 4-5 years old except for my iPhone which came out in 2017.

Works fine in Firefox in iOS...

Works fine in Firefox on Deepin as well.