Examine source code of Blood flow Animated

{
  "name": "Bleeding Animated",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Bloodrain-final-2.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(161, 16, 16, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(156, 87, 87, 0)",
      "toolbar_field_text": "rgba(3, 3, 3, 1)",
      "tab_line": "rgba(148, 148, 148, 0.44)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f922b52-63c5-4ec2-afbb-f5714802058b}"
    }
  }
}