Examine source code of Rainbow Sharks

{
  "name": "Rainbow Sharks",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Rainbow Sharks.png"
    },
    "colors": {
      "frame": "rgba(251, 246, 217, 1)",
      "tab_background_text": "rgba(247, 132, 17, 1)",
      "toolbar": "rgba(252, 192, 236, 0.66)",
      "bookmark_text": "rgba(12, 199, 124, 1)",
      "toolbar_field": "rgba(138, 252, 252, 0.58)",
      "toolbar_field_text": "rgba(197, 94, 235, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c494ae7-7817-4087-8f7d-f2d6cf7cd89d}"
    }
  }
}