Examine source code of Comix

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Comix",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(100, 90, 123, 0.9)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(86, 39, 61)",
      "tab_background_text": "rgb(210, 210, 210)",
      "toolbar_field": "rgba(179, 170, 137, 0.86)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(151, 151, 151)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgba(7, 34, 34, 0.77)",
      "button_background_hover": "rgba(151, 63, 140, 0.77)",
      "icons_attention": "rgb(255, 152, 0)",
      "icons": "rgb(0, 255, 90)",
      "popup_border": "rgba(255, 152, 0, 0)",
      "sidebar_border": "rgba(255, 255, 255, 0)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgba(53, 157, 50, 0.84)",
      "sidebar_text": "rgb(0, 0, 0)",
      "sidebar": "rgb(151, 151, 151)",
      "tab_loading": "rgb(255, 5, 5)",
      "tab_selected": "rgba(108, 174, 75, 0.92)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(83, 83, 83)",
      "toolbar_field_border_focus": "rgba(0, 0, 0, 0)",
      "toolbar_field_border": "rgba(255, 255, 255, 0.63)",
      "toolbar_field_focus": "rgba(205, 207, 188, 0.86)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(65, 138, 130)",
      "toolbar_top_separator": "rgba(158, 58, 58, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f60071d7-9990-4e32-86c9-9c33228506d3}"
    }
  }
}