Having the wrong favicon on a Safari bookmark isn’t a big deal when facing an almost-pandemic and climate emergency, but a couple of websites I visit frequently both ended up with the YouTube favicon for some reason and it was driving me a bit squirrelly – I wanted to at least fix this one tiny thing!
I tried deleting a bunch of files that I probably shouldn’t have in my library and it didn’t make a bit of difference. A helpful thread on an Apple community forum lead me to this trick of visiting a website in private mode to force its favicon to refresh. I don’t understand why this magic spell works, but all the wonky little favicons are back to normal and I can now worry about stocking up for a pandemic in peace. I hope this helps some other distracted soul.