Examine source code of calligraphy

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  "theme": {
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      "theme_frame": "6.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(240, 240, 240, 1)",
      "toolbar": "rgba(130, 75, 33, 0.66)",
      "bookmark_text": "rgba(240, 240, 240, 1)",
      "toolbar_field": "rgba(247, 180, 216, 0.24)",
      "toolbar_field_text": "rgba(237, 237, 237, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
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  "browser_specific_settings": {
    "gecko": {
      "id": "{51386598-c2f5-47c6-a70c-13b2f4206721}"
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