Examine source code of Swinging Moon

{
  "name": "Swinging Moon",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SwingingMoonH.jpg"
    },
    "colors": {
      "frame": "rgba(8, 6, 79, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(8, 6, 79, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(8, 6, 79, 0.06)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(244, 252, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{82e57d4e-7209-4963-b0d3-875ae5a86847}"
    }
  }
}