Examine source code of animated colour balls

{
  "name": "animated colour balls",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "7db6a534485b92e268643a18bd2326b9.gif"
    },
    "colors": {
      "frame": "rgba(13, 14, 15, 1)",
      "tab_background_text": "rgba(247, 29, 10, 0.93)",
      "toolbar": "rgba(20, 15, 15, 0)",
      "bookmark_text": "rgba(247, 134, 5, 0.84)",
      "toolbar_field": "rgba(10, 8, 8, 0)",
      "toolbar_field_text": "rgba(5, 245, 5, 1)"
    }
  }
}