As of August 11, 2020, the BigCommerce CDN will no longer downscale the resolution of images when it detects that an end user is shopping from a mobile device with a small screen.
In order to make sure that file size & quality is optimized for each device your shoppers use, we recommend using the Responsive Images feature of Cornerstone 4.0 and later themes, which provides all of the same benefits, with fewer downsides.
This change is being made because this CDN feature was responsible for a few bugs related to images appearing smaller than desired in a few cases, such as product zoom images on product pages. It is no longer necessary to use the
imbypass query parameter to resolve such issues.
The BigCommerce CDN will continue to optimize images for general file size, as well as choosing the most appropriate file format for a given device.