Examine source code of Bohr Atom

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Bohr Atom",
  "manifest_version": 2,
  "description": "A minimalist rendition of the Bohr model to liven up your browser. Perfect for physicists, chemists, or anyone with an interest in science"
}