Examine source code of Brown on Brown

{
  "name": "Brown on Brown",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "CopyofBrownonBrownH.jpg"
    },
    "colors": {
      "frame": "rgba(145, 125, 97, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(145, 124, 96, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(145, 124, 96, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{28436a2b-a3e1-4e46-a421-5300d50f9641}"
    }
  }
}