Examine source code of dark n beige

{
  "name": "dark n beige",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "blksqr.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(254, 255, 222, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(254, 255, 222, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(254, 255, 222, 1)",
      "tab_line": "rgba(254, 255, 222, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{94498b10-7df6-4a71-90f2-4caa6044ba68}"
    }
  }
}