Examine source code of cute pixel strawberries

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "pixel strawberry",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(251, 218, 221)",
      "toolbar_text": "rgb(215, 98, 124)",
      "frame": "rgb(251, 218, 221)",
      "tab_background_text": "rgb(156, 186, 114)",
      "toolbar_field": "rgb(255, 251, 255)",
      "toolbar_field_text": "rgb(239, 165, 172)",
      "tab_line": "rgb(255, 209, 220)",
      "popup": "rgb(251, 218, 221)",
      "popup_text": "rgb(215, 98, 124)",
      "tab_loading": "rgb(255, 209, 220)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca936f72-283a-4339-934f-d97244278d89}"
    }
  }
}