Examine source code of Frogs with Hearts

{
  "name": "Frogs with Hearts",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "FrogsandHeartsH.jpg"
    },
    "colors": {
      "frame": "rgba(205, 222, 205, 1)",
      "tab_background_text": "rgba(173, 12, 7, 1)",
      "toolbar": "rgba(206, 224, 207, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(206, 224, 207, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(173, 12, 7, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{74c5356d-97e2-42e2-ba1a-579495ad710d}"
    }
  }
}