Is it necessary to save favicon in ico format? Browser and png understand (at least Chrome)
PNG, as the icon format is understood by all "normal" browsers: MF, GH, Opera, Safari; But IE does not accept this format for the site icon.
IE generally perceives a lot of things differently than normal browsers. After all, everyone knows that IE is essentially a dead man ... I don’t even know why Microsoft continues to advertise it ...
You can write for normal browsers:
<link rel="icon" type="image/png" href="/fav.png" />
And for Micro $ oft IE:
<link rel="shortcut icon" type="image/vnd.microsoft.icon" href="/fav.ico" />
Or even score on M $ IE.