Examine source code of Old Compact Light

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Old Compact Light",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(245, 246, 247)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(227, 228, 230)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(76, 158, 217)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(215, 215, 216)",
      "button_background_hover": "rgb(234, 234, 234)",
      "icons": "rgb(76, 76, 76)",
      "ntp_background": "rgb(249, 249, 249)",
      "ntp_text": "rgb(92, 92, 92)",
      "sidebar_text": "rgb(48, 48, 48)",
      "sidebar": "rgb(240, 240, 240)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_selected": "rgb(76, 158, 217)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(190, 190, 192)",
      "toolbar_field_highlight": "rgb(76, 158, 217)",
      "toolbar_top_separator": "rgb(190, 190, 192)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{78adb426-b33a-44a2-9d4b-5957c993f16c}"
    }
  }
}