Examine source code of Monochromatic 2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Monochromatic 2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(16, 16, 16)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(9, 9, 9)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgb(9, 9, 9)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(21, 21, 21)",
      "popup": "rgb(19, 19, 19)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(32, 32, 32)",
      "button_background_hover": "rgb(32, 32, 32)",
      "frame_inactive": "rgb(32, 32, 32)",
      "icons_attention": "rgb(255, 217, 102)",
      "ntp_background": "rgb(19, 19, 19)",
      "popup_border": "rgb(21, 21, 21)",
      "popup_highlight": "rgb(16, 16, 16)",
      "sidebar": "rgb(19, 19, 19)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_selected": "rgb(21, 21, 21)",
      "toolbar_field_border_focus": "rgb(21, 21, 21)",
      "toolbar_field_border": "rgb(16, 16, 16)",
      "toolbar_field_highlight": "rgb(24, 24, 24)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2b8ae2e1-8500-412b-8883-cd3d30bcd609}"
    }
  }
}