Examine source code of EDM Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "EDM Purple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(70, 3, 139)",
      "toolbar_text": "rgb(33, 170, 247)",
      "frame": "rgb(33, 170, 247)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(177, 179, 249)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(181, 48, 206)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(81, 19, 218)",
      "tab_loading": "rgb(181, 48, 206)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4da2d0e-91de-44a6-ac3f-cfd45ccc1d7a}"
    }
  }
}