Examine source code of sigma avery (animated)

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Avery Sigma (Animated)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(31, 34, 61, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(31, 34, 61)",
      "tab_background_text": "rgb(204, 220, 240)",
      "toolbar_field": "rgba(54, 58, 89, 0.5)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(198, 23, 178, 0.75)",
      "popup": "rgba(31, 34, 61, 0.75)",
      "popup_text": "rgb(239, 235, 215)",
      "button_background_active": "rgba(103, 81, 221, 0.25)",
      "frame_inactive": "rgba(31, 34, 61, 0.25)",
      "icons": "rgb(103, 81, 221)",
      "tab_loading": "rgba(198, 23, 178, 0.75)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6b242b5-fe26-45f6-a599-56bc8f12bb37}"
    }
  }
}