Changing the favicon
Introduced in GitLab 11.0.
You can customize the favicon (the icon displayed in your web browser's address bar and web page tabs) for your GitLab server.
Navigate to the Admin area and go to the Appearance page, then locate the Favicon section.
Upload an image file of your favicon.
Save your changes.
Your new favicon will display in the browser. The main favicon and the CI status icons will show the custom icon: