Examine source code of Grenen 2 Seas

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Grenen 2 Seas",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(209, 203, 226)",
      "toolbar_text": "rgb(47, 45, 53)",
      "frame": "rgb(100, 98, 109)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgba(233, 232, 237, 0.85)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(100, 98, 109)",
      "popup": "rgb(100, 98, 109)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_active": "rgb(0, 166, 255)",
      "button_background_hover": "rgb(127, 124, 138)",
      "frame_inactive": "rgb(209, 203, 226)",
      "icons_attention": "rgb(255, 255, 255)",
      "icons": "rgb(29, 13, 96)",
      "ntp_background": "rgb(81, 80, 85)",
      "ntp_text": "rgb(47, 45, 53)",
      "popup_border": "rgb(0, 166, 255)",
      "popup_highlight_text": "rgb(0, 166, 255)",
      "popup_highlight": "rgb(100, 98, 109)",
      "sidebar_border": "rgb(202, 197, 218)",
      "sidebar_highlight": "rgb(0, 166, 255)",
      "sidebar": "rgb(209, 203, 226)",
      "tab_background_separator": "rgba(143, 140, 154, 0.85)",
      "tab_loading": "rgb(0, 166, 255)",
      "tab_selected": "rgb(209, 203, 226)",
      "tab_text": "rgb(85, 84, 87)",
      "toolbar_bottom_separator": "rgb(209, 203, 226)",
      "toolbar_field_border_focus": "rgb(0, 166, 255)",
      "toolbar_field_border": "rgb(81, 80, 85)",
      "toolbar_field_focus": "rgba(47, 45, 53, 0.9)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(0, 166, 255)",
      "toolbar_field_separator": "rgb(0, 166, 255)",
      "toolbar_field_text_focus": "rgb(0, 121, 189)",
      "toolbar_top_separator": "rgb(209, 203, 226)",
      "toolbar_vertical_separator": "rgb(127, 124, 138)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff56f3fb-4ac9-400d-ab73-aa1694baae91}"
    }
  }
}