To set a custom favicon:

1. Go to Tools & Settings > Branding (under Plesk Appearance).
2. Select the “Enable custom favicon” checkbox.
3. Upload the files:
   1.1. Click Choose file next to “Favicon file ICO”, locate the file, and then click Open.
   1.1. Click Choose file next to “Favicon file SVG”, locate the file, and then click Open.
4. Click OK.