Examine source code of rosified

{
  "theme": {
    "images": {
      "theme_frame": "January2010341.JPG"
    },
    "colors": {
      "frame": "#6b1e1e",
      "tab_background_text": "#e8d3d3"
    }
  },
  "version": "2.0",
  "name": "rosified",
  "manifest_version": 2
}