Examine source code of Black Bulls

{
  "name": "Black Bulls",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "BullsAbstractH.jpg"
    },
    "colors": {
      "frame": "rgba(191, 191, 191, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(191, 191, 191, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(191, 191, 191, 0.06)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(252, 242, 242, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b14c56c6-99ec-4637-8128-fb7b954cf5cb}"
    }
  }
}