Examine source code of Neon rain animated

{
  "name": "Neon rain animated",
  "manifest_version": 2,
  "version": "1.2",
  "theme": {
    "images": {
      "theme_frame": "giphy.gif"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0.25)",
      "toolbar_field": "rgba(0, 0, 0, 0.3)",
      "toolbar_field_text": "rgba(0, 255, 255, 1)",
      "popup": "rgba(53, 13, 79, 1)",
      "popup_text": "rgba(0, 255, 255, 1)",
      "tab_line": "rgba(145, 0, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{58957c7d-a663-4d12-a34e-086e9895aaa8}"
    }
  }
}