Firefox creates seams along the Tile lines if a Stamp is made large enough, has Custom Shadow, and has any changes made to Advanced Color Settings.
h Steps to reproduce
  • Select the Stamp Tool and open the catalog
  • Select a Stamp with Custom Shadow (Dead Trees work well for this)
  • Open the Advanced Settings and change a Color value (like Hue)
  • Place a Stamp
  • Increase Size so the Stamp covers most of the canvas
  • HD Export
Expected
: The Stamp should render as it is in the scene.
Actual
: The Stamp's shadow doesn't render over the Tile lines properly.