Examine source code of RedMerlot

{
  "name": "RedWine",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "02GCZS.jpg"
    },
    "colors": {
      "frame": "rgba(65, 63, 66, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(128, 0, 0, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(128, 0, 0, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(82, 0, 0, 0.32)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{75a14fd5-3625-44bf-a7fd-70629e2cbd7d}"
    }
  }
}