Examine source code of Holiday Pets by M♥Donna

{
  "name": "Holiday Pets by M♥Donna",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(232, 232, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(232, 232, 232, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(232, 232, 232, 0.09)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(250, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2a57b333-6ea6-46d8-a93a-797109f087c2}"
    }
  }
}