Examine source code of Kasane Teto Dark Mode

{
  "name": "Teto",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled106_20250705155658.PNG"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgba(255, 133, 149, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 133, 149, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.5)",
      "toolbar_field_text": "rgba(255, 133, 149, 1)",
      "tab_line": "rgba(255, 133, 149, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f1ec051a-61c9-4613-a6bc-17253b7b3bf3}"
    }
  }
}