Examine source code of Worm's Head

{
  "name": "Worm's Head",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(65, 73, 94, 1)",
      "tab_background_text": "rgba(97, 97, 68, 1)"
    }
  }
}