palemoon-dev/palemoon/branding/unstable/palemoon.VisualElementsManifest.xml

<Application xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
  <VisualElements
      ShowNameOnSquare150x150Logo='on'
      Square150x150Logo='browser\VisualElements\VisualElements_150.png'
      Square70x70Logo='browser\VisualElements\VisualElements_70.png'
      ForegroundText='light'
      BackgroundColor='#14141A'/>
</Application>