Examine source code of Cal Ballroom

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cal Ballroom",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(155, 172, 214, 0.39)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 37, 117)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(251, 195, 4)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(251, 195, 4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{df62400a-e37e-4d0e-9d2f-ab49b6e66e3c}"
    }
  }
}