Examine source code of Rainbow Hummingbird

{
  "name": "Rainbow Hummingbird",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "HummingbirdRAinbowH3.jpg"
    },
    "colors": {
      "frame": "rgba(165, 187, 237, 1)",
      "tab_background_text": "#000000",
      "toolbar": "rgba(168, 188, 240, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(168, 188, 240, 0.08)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(3, 3, 3, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3b53d26f-f4b9-41f4-921d-2ccaad3cf35b}"
    }
  }
}