A favicon, also called a bookmark icon, URL icon, website icon and shortcut icon, is a small icon that is displayed in the web browser. You can create a favicon by using an image editing software. You can also use an image to generate it. Follow the below mentioned instructions if you want to change your theme favicon:
Sign in to your wordpress admin and go to Themes Desk Framework.
Under General Settings Tab, Upload the Favicon through Media Uploader and Paste the Image Url under Favicon option.
This completes the process.