Examine source code of Fire-Heart

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Fire-Heart",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0, 0)",
      "toolbar_text": "rgb(215, 92, 219)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(130, 166, 208)",
      "toolbar_field": "rgb(61, 48, 82)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(164, 35, 205)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_hover": "rgba(0, 0, 0, 0.65)",
      "icons_attention": "rgb(255, 0, 121)",
      "icons": "rgb(192, 133, 214, 0.98)",
      "ntp_background": "rgb(58, 31, 44)",
      "popup_border": "rgb(255, 3, 87)",
      "sidebar_border": "rgba(253, 2, 46, 0)",
      "sidebar_text": "rgb(234, 136, 13)",
      "sidebar": "rgb(58, 31, 44)",
      "tab_text": "rgb(255, 179, 0)",
      "toolbar_bottom_separator": "rgba(255, 0, 103, 0)",
      "toolbar_field_border_focus": "rgb(156, 245, 9)",
      "toolbar_field_border": "rgba(251, 3, 99, 0.99)",
      "toolbar_field_text_focus": "rgba(255, 255, 255)",
      "toolbar_top_separator": "rgba(57, 15, 255, 0)",
      "tab_loading": "rgb(164, 35, 205)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4a126d2-5e6e-43b8-9833-7c2b48a24ab5}"
    }
  }
}