Examine source code of Bleeding Heart

{
  "name": "Bleeding Heart",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "BleedingHeartH2.jpg"
    },
    "colors": {
      "frame": "rgba(250, 244, 213, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(255, 251, 229, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(252, 247, 214, 0.06)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{80894cb5-b89a-4b18-a8bb-a2010ab9c8af}"
    }
  }
}