Comment by mathfailure

Yes, with static image CPU consumption goes to ~0%. chrome://gpu says:

Graphics Feature Status

=======================

* Canvas: Hardware accelerated

* Direct Rendering Display Compositor: Disabled

* Compositing: Hardware accelerated

* Multiple Raster Threads: Enabled

* OpenGL: Enabled

* Rasterization: Hardware accelerated on all pages

* Raw Draw: Disabled

* Skia Graphite: Disabled

* Video Decode: Hardware accelerated

* Video Encode: Software only. Hardware acceleration disabled

* Vulkan: Disabled

* WebGL: Hardware accelerated

* WebGL2: Hardware accelerated

* WebGPU: Disabled

* WebNN: Disabled