Examine source code of BG.5

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "BG.5",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(105, 0, 108)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(251, 2, 6)",
      "toolbar_field": "rgb(49, 49, 49)",
      "toolbar_field_text": "rgb(223, 250, 0)",
      "tab_line": "rgb(47, 120, 255)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(0, 108, 0)",
      "tab_loading": "rgb(47, 120, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{212e75a4-71f8-49d0-81e4-88478f2300e7}"
    }
  }
}