Examine source code of Pixel level up

{
  "name": "Pixel level up",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Pixel level up .jpg"
    },
    "colors": {
      "frame": "rgba(86, 119, 196, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(227, 250, 153, 1)",
      "toolbar_field": "rgba(53, 92, 140, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b23b9d7b-459d-4ec9-953b-944035224515}"
    }
  }
}