Examine source code of Higher Hopes

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "High Hopes",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-y"
      ]
    },
    "colors": {
      "toolbar": "rgba(23, 18, 11, 0.25)",
      "toolbar_text": "rgba(0, 0, 0, 0.9)",
      "frame": "rgb(169, 157, 143)",
      "tab_background_text": "rgb(61, 53, 45)",
      "toolbar_field": "rgba(84, 79, 74, 0.68)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.95)",
      "tab_line": "rgba(255, 255, 255, 0.65)",
      "popup": "rgba(199, 191, 183, 0.68)",
      "popup_text": "rgba(0, 0, 0, 0.9)",
      "ntp_background": "rgb(168, 162, 155)",
      "ntp_text": "rgb(61, 53, 45)",
      "sidebar_border": "rgba(255, 255, 255, 0.4)",
      "sidebar_text": "rgba(0, 0, 0, 0.95)",
      "sidebar": "rgb(199, 191, 183)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgba(217, 206, 193, 0.4)",
      "tab_loading": "rgba(255, 255, 255, 0.65)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3737fa57-9c71-42a4-bd1c-f8d228a715d0}"
    }
  }
}