Examine source code of Aerospace Aluminum

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#e0e0e0",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Aerospace Aluminum",
  "manifest_version": 2,
  "description": "Simple, elegant aerospace aluminum alloy based theme. Add to your browser and click Fav ♡ if you like it. Works great and looks clean! Enjoy (updated: removed dotted line for use with or without \"menu bar\"."
}