Examine source code of Tk-Matrix

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Tk-Matrix",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.6)",
      "toolbar_text": "rgba(189, 255, 0, 0.8)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(167, 189, 100)",
      "toolbar_field": "rgba(180, 195, 139, 0.3)",
      "toolbar_field_text": "rgba(189, 255, 0, 0.9)",
      "tab_line": "rgba(189, 255, 0, 0.8)",
      "popup": "rgba(0, 0, 0, 0.5)",
      "popup_text": "rgb(189, 255, 0)",
      "button_background_active": "rgba(189, 255, 0, 0.5)",
      "button_background_hover": "rgba(189, 255, 0, 0.4)",
      "frame_inactive": "rgba(189, 255, 0, 0.8)",
      "icons_attention": "rgb(189, 255, 0)",
      "icons": "rgba(189, 255, 0, 0.8)",
      "ntp_background": "rgb(32, 32, 32)",
      "ntp_text": "rgba(189, 255, 0, 0.8)",
      "popup_border": "rgba(187, 255, 0, 0.8)",
      "popup_highlight_text": "rgb(189, 255, 0)",
      "popup_highlight": "rgba(189, 255, 0, 0.2)",
      "sidebar_border": "rgb(189, 255, 0)",
      "sidebar_highlight_text": "rgb(189, 255, 0)",
      "sidebar_highlight": "rgba(189, 255, 0, 0.4)",
      "sidebar_text": "rgba(189, 255, 0, 0.8)",
      "sidebar": "rgb(189, 255, 0)",
      "tab_background_separator": "rgba(189, 255, 0, 0.4)",
      "tab_loading": "rgba(189, 255, 0, 0.9)",
      "tab_selected": "rgba(189, 255, 0, 0.25)",
      "tab_text": "rgba(189, 255, 0, 0.9)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0.5)",
      "toolbar_field_border_focus": "rgba(189, 255, 0, 0.9)",
      "toolbar_field_border": "rgba(189, 255, 0, 0.5)",
      "toolbar_field_focus": "rgba(32, 32, 32, 0.5)",
      "toolbar_field_highlight_text": "rgba(189, 255, 0, 0.8)",
      "toolbar_field_highlight": "rgba(189, 255, 0, 0.3)",
      "toolbar_field_separator": "rgba(189, 255, 0, 0.3)",
      "toolbar_field_text_focus": "rgba(189, 255, 0, 0.8)",
      "toolbar_top_separator": "rgba(76, 102, 0, 0.5)",
      "toolbar_vertical_separator": "rgba(189, 255, 0, 0.3)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1aa31ca3-2898-4ac4-a5e8-0cf1865a4659}"
    }
  }
}