Examine source code of Brave

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Brave",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(57, 67, 137)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(208, 219, 230)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(47, 53, 95)",
      "toolbar_field_text": "rgb(239, 244, 245)",
      "tab_line": "rgb(67, 194, 218)",
      "popup": "rgb(68, 81, 91)",
      "popup_text": "rgb(239, 245, 246)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(90, 100, 112)",
      "tab_loading": "rgb(67, 194, 218)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd24a4f8-0cc8-4696-800f-bf61488f0eac}"
    }
  }
}