Examine source code of Muji Overlay 06

{
  "name": "Muji Overlay 06",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "m-ov06_2.jpg"
    },
    "colors": {
      "frame": "rgba(210, 210, 210, 1)",
      "tab_background_text": "rgba(38, 36, 34, 1)",
      "toolbar_field": "rgba(233, 231, 226, 1)",
      "toolbar_field_text": "rgba(38, 36, 34, 1)",
      "tab_line": "rgba(210, 210, 210, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a69d5c19-104a-4664-beae-49fe23f0cd4f}"
    }
  }
}