Examine source code of GReenlines

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "GReenlines",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(20, 49, 2)",
      "toolbar_text": "rgb(2, 248, 35)",
      "frame": "rgb(9, 10, 9)",
      "tab_background_text": "rgb(5, 251, 5)",
      "toolbar_field": "rgb(4, 26, 3)",
      "toolbar_field_text": "rgb(66, 251, 5)",
      "tab_line": "rgb(53, 130, 64)",
      "popup": "rgb(13, 14, 12)",
      "popup_text": "rgb(45, 166, 5)",
      "sidebar_border": "rgb(104, 255, 2)",
      "sidebar_highlight": "rgb(82, 232, 3)",
      "sidebar_text": "rgb(127, 255, 2)",
      "sidebar": "rgb(26, 26, 25)",
      "tab_loading": "rgb(53, 130, 64)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff7ee9fa-4f5c-4cac-95ee-7e3cd4276ef2}"
    }
  }
}