Examine source code of Belphemon animated

{
  "name": "belphemon",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "ezgif.com-gif-maker(17).gif"
    },
    "colors": {
      "frame": "rgba(15, 0, 33, 1)",
      "tab_background_text": "rgba(179, 0, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(179, 0, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(179, 0, 255, 1)",
      "tab_line": "rgba(179, 0, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0640447c-cf84-474e-8774-ca3eb85d1ee4}"
    }
  }
}