Examine source code of Digital Rainbow Waveform

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Digital Rainbow Soundwave 2.0",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.8)",
      "toolbar_text": "rgb(255, 0, 246)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(135, 135, 135, 0.7)",
      "toolbar_field_text": "rgb(0, 255, 245)",
      "tab_line": "rgb(84, 84, 84)",
      "popup": "rgb(59, 59, 59)",
      "popup_text": "rgb(253, 255, 0)",
      "tab_loading": "rgb(84, 84, 84)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d4b27df-18a4-4c75-8443-d1a92055e679}"
    }
  }
}