Examine source code of Red Bot

{
  "manifest_version": 2,
  "name": "Red Bot",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar_text": "rgb(218, 218, 218)",
      "frame": "rgb(61, 61, 73)",
      "toolbar_field": "rgba(61, 61, 73, 0)",
      "tab_loading": "rgb(255, 101, 101)",
      "icons_attention": "rgb(198, 59, 59)",
      "popup_text": "rgb(215, 226, 239)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_top_separator": "rgb(61, 61, 73)",
      "toolbar": "rgba(61, 61, 73, 0)",
      "toolbar_field_border_focus": "rgb(198, 59, 59)",
      "tab_selected": "rgba(226, 43, 43, 0.6)",
      "tab_line": "rgb(255, 101, 101)",
      "popup": "rgb(31, 34, 61)"
    }
  },
  "version": "2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1b93f961-efa9-45c2-b074-39dc30995b60}"
    }
  }
}