This is a new Chrome extension that is not widely available to the general public. It was privately made and not available on the Chrome web store.
You use this extension to find the low priced color/size/variation when you are doing AZ to AZ flips ( Amazon to Amazon flips)
I made a video on how to do it because it is easier to see and explain than reading about.
You can get the extension here: https://gumroad.com/a/852767859