Examine source code of Whispering Petals

{
  "name": "Whispering Petals",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Whispering Petals.png"
    },
    "colors": {
      "frame": "rgba(40, 40, 69, 1)",
      "tab_background_text": "rgba(255, 148, 182, 1)",
      "toolbar": "rgba(178, 150, 217, 0.45)",
      "toolbar_field": "rgba(255, 255, 255, 0.58)",
      "toolbar_field_text": "rgba(62, 50, 130, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f2a30ba7-9a88-4828-9d4c-d5ec33518c5f}"
    }
  }
}