Examine source code of Classic Mega Man

{
  "theme": {
    "images": {
      "theme_frame": "MEGAFOX2Kopie.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Classic Mega Man",
  "manifest_version": 2,
  "description": "A Megaman personas. \nI made it for my Firefox with multi-row boockmark toolbar. I hope with a normal fox it's also work."
}