Examine source code of 2B Colorful

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "2B Colorful ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(29, 26, 32)",
      "toolbar_text": "rgb(255, 0, 104)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(207, 0, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(29, 221, 221)",
      "tab_line": "rgb(255, 0, 207)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 138, 0)",
      "button_background_active": "rgba(0, 0, 0, 0)",
      "tab_loading": "rgb(255, 0, 207)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{750de438-b2be-4dac-8e50-73fa60750a81}"
    }
  }
}