The website has a few themes, and for some of them I can see favicon, for some - not. And I can’t find the difference and solve this issue. Here are the attempts to solve it (not successful):
add favicon in png and ico in assets (links in the layout.theme.liquid)
add favicon in files and tried in two different ways (links in the layout.theme.liquid)
I forgot to comment unused lines here, but originally I tried one line at a time, which means I tested with first line, then second version etc.. So, when I did as you suggest I still didn’t see the favicon.
You mention that second link is broken. It is also a good question, because I do have both file favicon.png and favicon.ico in assets and for this line code is . I also don’t understand why it is broken or why shopify don’t support ico format.
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I think this will help you quickly.thanks