Examine source code of RFG Logo Simple

{
  "theme": {
    "images": {
      "theme_frame": "RFG_firefox_persona_header.jpg"
    },
    "colors": {
      "frame": "#eb7434",
      "tab_background_text": "#eb772f"
    }
  },
  "version": "2.0",
  "name": "RFG Logo Simple",
  "manifest_version": 2,
  "description": "This is a very simple persona I created using the logo of the first game I worked on as a programmer: \"Red Faction: Guerrilla\"."
}