This is a kind of simple thing to do, but not everyone knows this. If you want to change the favicon on ServiceNow, which is website icon in the browser, here are some instructions to do just that.
How to change the ServiceNow Favicon
1. ICO File. Find the .ico file you want to use. Commonly a favicon is a 16 x 16 image in the ico format. The filename must NOT be favicon.ico. Name the file something else, like corpfavicon.ico.
2. Upload File. Go to System Definition > Upload File and upload your .ico file. Note that the filename changes to lower case.
3. Set favicon Properties. In System Properties > System, there is a property
Icon image displayed in bookmarks and browser address bar. This property is also known as: glide.product.icon
Set the property to your file uploaded and save.
4. See Results. Refresh your browser to see the result.