Examine source code of Full Moon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Moon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(212, 210, 222)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(220, 209, 225)",
      "toolbar_field": "rgba(62, 66, 97, 0.76)",
      "toolbar_field_text": "rgb(203, 193, 208)",
      "tab_line": "rgba(121, 138, 193, 0.59)",
      "popup": "rgb(47, 50, 75)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_hover": "rgba(54, 62, 106, 0.9)",
      "frame_inactive": "rgb(42, 211, 42)",
      "icons_attention": "rgba(176, 198, 206, 0.9)",
      "icons": "rgba(143, 109, 108, 0.83)",
      "tab_background_separator": "rgb(99, 179, 101)",
      "tab_selected": "rgb(48, 56, 67)",
      "tab_text": "rgb(212, 204, 210)",
      "toolbar_bottom_separator": "rgb(56, 61, 87)",
      "toolbar_top_separator": "rgba(56, 61, 87, 0.69)",
      "toolbar_vertical_separator": "rgba(152, 120, 164, 0.83)",
      "tab_loading": "rgba(121, 138, 193, 0.59)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1da42334-d85a-4241-af98-0e875a0c6e45}"
    }
  }
}