Examine source code of Bleach Mugetsu

{
  "theme": {
    "images": {
      "theme_frame": "logo.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Bleach Mugetsu",
  "manifest_version": 2,
  "description": "Ichigo in FGT form, Mugetsu.\nI think you like it :)\n\nPS: I made it for 1280x1024, idk how it works in other resolution."
}