Examine source code of Vigna

{
  "name": "Vigna",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "aff23224daca37459ccbfd36ca5037e0.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(242, 233, 233, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e41f5dcf-6b37-4ab2-981f-4ab002d67eda}"
    }
  }
}