Examine source code of helldivers resting

{
  "name": "helldivers resting",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "темка.gif"
    },
    "colors": {
      "frame": "rgba(18, 17, 17, 1)",
      "tab_background_text": "rgba(255, 245, 219, 1)",
      "toolbar": "rgba(18, 17, 17, 1)",
      "bookmark_text": "rgba(242, 184, 57, 1)",
      "toolbar_field": "rgba(18, 17, 17, 1)",
      "toolbar_field_text": "rgba(255, 245, 219, 1)",
      "tab_line": "rgba(255, 245, 219, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{446f48ed-fb55-4303-ab8b-499f57b253ce}"
    }
  }
}