Examine source code of OffGamers Textured

{
  "theme": {
    "images": {
      "theme_frame": "header_img2.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#23314e"
    }
  },
  "version": "2.0",
  "name": "OffGamers Textured",
  "manifest_version": 2,
  "description": "We are publishing our very first Persona for our valued users who uses Firefox as their preferred browser when visiting our site."
}