Examine source code of squirrel1957

{
  "theme": {
    "images": {
      "theme_frame": ".jpg"
    },
    "colors": {
      "frame": "#b53c17",
      "tab_background_text": "#47230a"
    }
  },
  "version": "2.0",
  "name": "squirrel1957",
  "manifest_version": 2,
  "description": "squirrel1957"
}