Examine source code of Black Horizon

{
  "theme": {
    "images": {
      "theme_frame": "BloodOhizon.JPG"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Black Horizon",
  "manifest_version": 2,
  "description": "Sometimes, the days seem darker, and the sun just seems to die out in this dark world of ours."
}