Adding a favicon - not working

I try to add favicon to my site. I am upload the favicon to directory index and I add this line to my header site:

<link rel="icon" href="http://example.com/favicon.ico">

Maybe its chache? help me please :)

edit: I am dont see request to favicon :O https://i.sstatic.net/1DET3.png

Any-asnwer not working..

Maybe I need clear chache?

EDIT: THIS IS WORKING NOW, THANKS FOR ALL!

Solution

Your favicon may be the wrong bit depth and/or size. Save your favicon as an 8bit (jpg is 8-bit, but png is better and you can save for web as 8-bit, it doesn't need to be .ico) image and make sure to clear your cache. On upload, it should show in all browsers. Save it as ideally 16x16 pixels