Examine source code of Greeny & Bluey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Greeny & Bluey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(77, 136, 130)",
      "toolbar_text": "rgb(7, 187, 114)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(4, 86, 53)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(47, 85, 69)",
      "tab_line": "rgb(25, 41, 34)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(35, 35, 108)",
      "tab_loading": "rgb(25, 41, 34)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6efb555-4070-4324-aba5-2251f5b56eae}"
    }
  }
}