Samsung Appliances don’t have the best track record for being reliable… Something tells me if they did add something like that, within the first year it’d either break down OR work too well and result in a number of loss of limb lawsuits against the company.

I agree GNOME is resource heavy however that has nothing to do with Javascript being involved. The James Web Telescope uses Javascript for some of its core functionality (specifically managing its science modules), does that make it a web browser? I personally don’t like GNOME either, but most of it is written in C, it has its own GUI library which is written in C. The Javascript code likely just is used to simplify calling the underlying C functions and CSS is used for customizing the actual UI elements.

Try messing with the hardware acceleration options in the advanced settings. I can’t say I’ve seen any stuttering using just Intel integrated graphics or on my laptop with Intel + Nvidia quadro. If your using Linux there’s a good chance it’s a Nvidia driver issue. You could open the developer tools side by side with Firefox and Chrome and go to the network or performance tabs and compare side by side.