Examine source code of Streamline Office 2

{
  "name": "HD_transparent_picture",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "HD_transparent_picture.png"
    },
    "colors": {
      "frame": "rgba(255, 163, 3, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(209, 224, 240, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c922bd9a-e0ab-49e9-9a8b-4240ff7dde7f}"
    }
  }
}