Examine source code of wintery pine cones

{
  "name": "wintery pine cones",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "snowy pine cones heavier edit x112.png"
    },
    "colors": {
      "frame": "rgba(3, 3, 3, 1)",
      "tab_background_text": "rgba(36, 215, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0.28)",
      "bookmark_text": "rgba(23, 220, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.48)",
      "toolbar_field_text": "rgba(255, 171, 242, 1)",
      "tab_line": "rgba(255, 138, 234, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c7f9c9e0-887c-4d79-bd57-291c2bc2e69e}"
    }
  }
}