Examine source code of Sylvester Cat ANIMATED

{
  "theme": {
    "images": {
      "theme_frame": "Sylvestercathead.png"
    },
    "colors": {
      "frame": "#b0aaaa",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Sylvester Cat ANIMATED",
  "manifest_version": 2,
  "description": "Sylvester the cat running animation on white background with black text.\nAll the very best.\nDay."
}