Examine source code of Ubuntu-Green-Mate

{
  "manifest_version": 2,
  "version": "1.4",
  "name": "Ubuntu-Green-Mate",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(109, 147, 55)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(48, 64, 15)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(48, 64, 15)",
      "button_background_hover": "rgb(58, 90, 15)",
      "frame_inactive": "rgb(255, 255, 255)",
      "icons_attention": "rgb(0, 0, 0)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(255, 255, 255)",
      "popup_border": "rgb(48, 64, 15)",
      "popup_highlight": "rgb(109, 147, 55)",
      "sidebar_border": "rgb(48, 64, 15)",
      "sidebar_highlight_text": "rgb(0, 0, 0)",
      "sidebar_highlight": "rgb(48, 64, 15)",
      "sidebar_text": "rgb(0, 0, 0)",
      "sidebar": "rgb(255, 255, 255)",
      "tab_loading": "rgb(48, 64, 15)",
      "tab_selected": "rgb(255, 255, 255)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(255, 255, 255)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a56e1be4-084f-4223-994f-b704de347476}"
    }
  }
}