Examine source code of Postal (2)

{
  "name": "Postal",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "dude test maygood.png"
    },
    "colors": {
      "frame": "rgba(3, 0, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(212, 11, 11, 0.27)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(194, 31, 31, 1)",
      "tab_line": "rgba(148, 41, 41, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ab8e495d-db4b-4734-bef2-b8351d1b8418}"
    }
  }
}