Examine source code of brrown

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "brrown",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-030-0f935cfde055600d01a959c5c15353de.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(81, 65, 58)",
      "toolbar_text": "rgb(248, 180, 112)",
      "frame": "rgb(53, 42, 35)",
      "tab_background_text": "rgb(231, 221, 210)",
      "toolbar_field": "rgb(247, 238, 233)",
      "toolbar_field_text": "rgb(246, 127, 51)",
      "tab_line": "rgb(246, 127, 51)",
      "popup": "rgb(68, 64, 60)",
      "popup_text": "rgb(226, 215, 209)",
      "tab_loading": "rgb(246, 127, 51)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{12ce953a-fde7-46c8-b82a-626d5384f37d}"
    }
  }
}