Examine source code of Maxwell Cat Animated

{
  "name": "Maxwell Cat Animated",
  "manifest_version": 2,
  "version": "7.0",
  "theme": {
    "images": {
      "theme_frame": "test32.gif"
    },
    "colors": {
      "frame": "rgba(26, 35, 59, 1)",
      "tab_background_text": "rgba(245, 247, 222, 1)",
      "toolbar": "rgba(43, 43, 43, 1)",
      "toolbar_field": "rgba(77, 77, 77, 1)",
      "toolbar_field_text": "rgba(255, 220, 138, 1)",
      "tab_line": "rgba(255, 220, 138, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{08ea7ea7-0708-4a35-a90f-7e7e263179df}"
    }
  }
}