Examine source code of Music Volume by C.O.D Lab

{
  "name": "Music Volume by C.O.D Lab",
  "manifest_version": 2,
  "version": "9.0",
  "theme": {
    "images": {
      "theme_frame": "eurodanceline.png"
    },
    "colors": {
      "frame": "rgba(20, 71, 71, 1)",
      "tab_background_text": "rgba(250, 15, 15, 1)",
      "toolbar": "rgba(30, 30, 36, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.01)",
      "toolbar_field_text": "rgba(235, 151, 82, 1)"
    }
  }
}