AGreenEarth, interesting I can't seem to get the Amazon widget again. I wasn't doing anything special to display it last time. Maybe that was removed or changed?
Anyways, here is a summary about the point of .ico files.
Bold means it loads an image from duckduckgo.com for the favicons
next to search results:
Image in zero-click loaded through duckduckgo.com:
Let Me DuckDuckGo That For You
- 3g2upl4pq6kufc4m.onion -- no image was presented