
You might think that favicons are easy and simple, like I did, until I found this favicon generator site that shows how complicated it can be to support various favicon resolutions and multiple system platforms (Desktop, Windows, IE, Android, iOS, etc).
I wanted to share it here:
https://realfavicongenerator.net/
I am updating the some icons for our websites and just used it. I uploaded a 260x260 icon image (the size it recommends) and it generated a bunch of files at various resolutions and the HTML to put in the "head" section. Honestly, I'm not sure I want to put all that HTML in the head section just for a favicon but I have all the files I need and the HTML just in case.
You may want to review your site's favicon files.