Examine source code of Your Grandpa

{
  "theme": {
    "images": {
      "theme_frame": "ff_persona_02.jpg"
    },
    "colors": {
      "frame": "#3b43d4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Your Grandpa",
  "manifest_version": 2,
  "description": "Never forget that grandpa sees everything."
}