Do you still think uploading favicon.ico to your website root is enough? Not anymore as new devices have there own requirement and needs to be tested well.
So what you should do?
Step 1 – Visit https://realfavicongenerator.net/favicon_checker to check your existing favicon icon. If you clear all test you don’t need to do anything.
Step 2- Visit https://realfavicongenerator.net/ to generate new Favicon ICON and supported files. Proceed as per instruction provided and test again using Step 1.
This provides solution for iOS Safari, Android Chrome, Windows 8 and 10, Mac OS X El Capitan Safari,Classic, desktop browsers.