Examine source code of Hydrangea in August

{
  "name": "Hydrangea in August",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "HydrangiainAugustH1.jpg"
    },
    "colors": {
      "frame": "rgba(30, 61, 45, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(30, 61, 46, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(30, 61, 46, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(182, 219, 245, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ce035634-85ac-49bc-aa7e-644e9009dcc1}"
    }
  }
}