Examine source code of Starry stars

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Starry",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(235, 216, 246, 0.5)",
      "toolbar_text": "rgb(52, 0, 104)",
      "frame": "rgb(209, 179, 239)",
      "tab_background_text": "rgb(68, 40, 94)",
      "toolbar_field": "rgba(255, 253, 235, 0.9)",
      "toolbar_field_text": "rgb(91, 0, 186)",
      "tab_line": "rgb(255, 236, 134)",
      "popup": "rgb(227, 204, 250)",
      "popup_text": "rgb(72, 0, 148)",
      "tab_loading": "rgb(255, 236, 134)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c20bba2-872c-453e-9982-51d5046a0d75}"
    }
  }
}