Examine source code of hacker style

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "绿油油",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(42, 49, 55)",
      "toolbar_text": "rgb(63, 234, 128)",
      "frame": "rgb(42, 74, 94)",
      "tab_background_text": "rgb(86, 252, 77)",
      "toolbar_field": "rgb(31, 44, 23)",
      "toolbar_field_text": "rgb(7, 251, 48)",
      "tab_line": "rgb(225, 93, 121)",
      "popup": "rgb(34, 51, 41)",
      "popup_text": "rgb(34, 226, 39)",
      "button_background_active": "rgb(101, 72, 73)",
      "button_background_hover": "rgba(238, 232, 21, 0.69)",
      "frame_inactive": "rgba(64, 28, 81, 0.94)",
      "icons_attention": "rgba(148, 227, 55, 0.69)",
      "icons": "rgb(233, 67, 21)",
      "ntp_background": "rgba(17, 55, 78, 0.76)",
      "ntp_text": "rgb(251, 14, 40)",
      "popup_border": "rgba(69, 98, 117, 0.76)",
      "popup_highlight_text": "rgba(252, 54, 8, 0.34)",
      "popup_highlight": "rgba(107, 84, 138, 0.76)",
      "sidebar_border": "rgba(218, 114, 164, 0.34)",
      "sidebar_highlight_text": "rgba(113, 150, 91, 0.76)",
      "sidebar_highlight": "rgb(47, 86, 208)",
      "sidebar_text": "rgb(55, 170, 14)",
      "tab_loading": "rgb(225, 93, 121)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{195d6682-1c08-4a1f-97eb-f5249bce1dae}"
    }
  }
}