Click the Settings icon, then Website and click Pages. Choose a domain to work with under Choose a domain to edit its setting, and then click the Brand tab and Upload an image in the favicon section and click Save.
From your Hubspot dashboard, click the settings icon in the top right.
Under Choose a domain to edit its setting, use the dropdown to select which domain you would like to work with.
Click the Branding tab and then Upload in the Favicon section to upload the image you would like to use. 