Examine source code of Just a test

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Miku Hatsune Omega Clean",
  "manifest_version": 2,
  "description": "Miku Hatsune Omega Clean",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d9a1a00-714c-4fde-b499-7a1f04d47d2e}"
    }
  }
}