Examine source code of PUPWEl

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "PUPWEl",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(68, 41, 107, 0)",
      "toolbar_text": "rgb(255, 202, 239)",
      "frame": "rgb(50, 29, 79)",
      "tab_background_text": "rgb(227, 154, 205)",
      "toolbar_field": "rgba(116, 63, 192, 0.52)",
      "toolbar_field_text": "rgb(255, 202, 239)",
      "tab_line": "rgb(255, 202, 239)",
      "popup": "rgba(255, 202, 239, 0.63)",
      "popup_text": "rgb(105, 0, 255)",
      "tab_loading": "rgb(255, 202, 239)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ae435869-e291-4c5f-9f73-2cf409a4c6d7}"
    }
  }
}