Examine source code of np&b v2

{
  "name": "np&b v2",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "R.jpg"
    },
    "colors": {
      "frame": "rgba(2, 0, 3, 1)",
      "tab_background_text": "rgba(140, 74, 71, 1)",
      "toolbar": "rgba(51, 2, 69, 1)",
      "bookmark_text": "rgba(219, 31, 31, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(219, 31, 31, 1)",
      "tab_line": "rgba(219, 31, 31, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee2f4644-2ca2-4159-86ba-2705583a4206}"
    }
  }
}