Examine source code of Dolphins (NRL)

{
  "name": "Dolphins (NRL)",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "dolphins.svg"
    },
    "colors": {
      "frame": "rgba(252, 20, 29, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(178, 4, 11, 0.7)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(178, 4, 11, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(224, 205, 133, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{06595d23-739a-4ead-892e-b5c52d773154}"
    }
  }
}