Examine source code of Guilty Gear Justice

{
  "theme": {
    "images": {
      "theme_frame": "Justiceforfirefox1a.JPG"
    },
    "colors": {
      "frame": "#e9f1f2",
      "tab_background_text": "#0a4bcc"
    }
  },
  "version": "2.0",
  "name": "Guilty Gear Justice",
  "manifest_version": 2,
  "description": "my first persona... i hope you like it!"
}