Examine source code of slight glow

{
  "theme": {
    "images": {
      "theme_frame": "glow.jpg"
    },
    "colors": {
      "frame": "#9e9999",
      "tab_background_text": "#b8afaf"
    }
  },
  "version": "2.0",
  "name": "slight glow",
  "manifest_version": 2,
  "description": "a little piece of art"
}