Examine source code of Purple Shards

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Shards",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 0, 68)",
      "toolbar_text": "rgb(240, 221, 255)",
      "frame": "rgb(56, 0, 98)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(45, 15, 70)",
      "toolbar_field_text": "rgb(240, 221, 255)",
      "tab_line": "rgb(205, 35, 185)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(205, 35, 185)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad8986d9-61cc-4737-b130-b2c6882f718b}"
    }
  }
}