Examine source code of Smiley Chase...

{
  "theme": {
    "images": {
      "theme_frame": "fx-eat.png"
    },
    "colors": {
      "frame": "#474747",
      "tab_background_text": "#8f8f8f"
    }
  },
  "version": "2.0",
  "name": "Smiley Chase...",
  "manifest_version": 2,
  "description": "It's a SMILEY CHAAASSE! Watch out! Hehe, just made this one for fun, hope you guys like it.\n\nVisit my art page at art-junki3.deviantart.com."
}