Examine source code of op_flag

{
  "theme": {
    "images": {
      "theme_frame": "Sinttulo-1.jpg"
    },
    "colors": {
      "frame": "#c4c92c",
      "tab_background_text": "#d4c435"
    }
  },
  "version": "2.0",
  "name": "op_flag",
  "manifest_version": 2,
  "description": "flag op"
}