As an example, when I open rickbern.com in Chrome or Brave under default settings, some of the headshots are displayed as grainy or speckled. In Chrome:
In Brave:
However, in Firefox, these same images are pristine:
If I turn off hardware acceleration in Chrome (by going to Settings, searching for "hardware," turning off the option "Use hardware acceleration when available," and relaunching Chrome), the images are significantly improved, but in fact still show the same graininess or speckling on a lower level (perhaps most visibly in the hair):
Broadly, what is the underlying source of the graininess in Chrome and Brave, and how can I fix it?
If somehow relevant, I am viewing these images on a Dell Precision 3541 running Windows 10. The screen is 15.6" FHD WVA (1920x1080).