Examine source code of Veggies

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Veggies",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(14, 151, 50, 0.93)",
      "toolbar_text": "rgba(0, 255, 214, 0.92)",
      "frame": "rgb(25, 212, 39)",
      "tab_background_text": "rgb(227, 31, 35)",
      "toolbar_field": "rgb(74, 185, 116)",
      "toolbar_field_text": "rgb(6, 14, 255)",
      "tab_line": "rgba(182, 27, 58, 0.75)",
      "popup": "rgb(79, 135, 82)",
      "popup_text": "rgb(22, 182, 38)",
      "button_background_active": "rgb(7, 168, 146)",
      "tab_loading": "rgba(182, 27, 58, 0.75)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dba60df8-380d-4232-8cbd-c25a0b53234a}"
    }
  }
}