Bing Search Tests Circle Shaped Favicons

Almost a year ago, we reported how Bing Search went from circle favicons in the search results to square favicons in the search results. Now, we are seeing Bing testing going back to the circle formatted favicons.

Here are the square formatted ones that I see:

While trying to replicate it, I spotted a smaller version of the square favicons:

Here is the circle format spotted by Khushal Bherwani who posted this screenshot on X:

Forum discussion at X.