Examine source code of Lofi Chill

{
  "name": "Lofi Chill",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "lofi cat.jpg"
    },
    "colors": {
      "frame": "rgba(112, 100, 148, 1)",
      "tab_background_text": "rgba(224, 192, 214, 0.7)",
      "toolbar": "rgba(0, 0, 0, 0.2)",
      "bookmark_text": "rgba(224, 192, 215, 0.54)",
      "toolbar_field": "rgba(224, 192, 215, 0.54)",
      "toolbar_field_text": "rgba(245, 245, 245, 0.86)",
      "tab_line": "rgba(224, 192, 215, 0.54)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{870fafb9-d390-4fb2-9bd9-2a42de7acf6c}"
    }
  }
}