Examine source code of tricky cheshire

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#2b2a16",
      "tab_background_text": "#5bf7f2"
    }
  },
  "version": "2.0",
  "name": "tricky cheshire",
  "manifest_version": 2,
  "description": "dark cheshire cat smile that reads a quote from the original book by Carrol Lewis, \"We're all mad here\"."
}