Examine source code of Tema Infinito

{
  "manifest_version": 3,
  "version": "1.0.0",
  "name": "Tema Infinito",
  "description": "Un hermoso tema con fondo animado que se desplaza hacia el infinito.",
  "author": "Ramoncito",
  "browser_specific_settings": {
    "gecko": {
      "id": "infinito-theme@ramoncito.com",
      "strict_min_version": "109.0"
    }
  },
  "theme": {
    "images": {
      "theme_frame": "empty.svg",
      "additional_backgrounds": [
        "pattern_animado.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#111111",
      "toolbar": "transparent",
      "toolbar_field": "rgba(255, 255, 255, 0.5)",
      "toolbar_field_text": "#000000",
      "toolbar_text": "#000000",
      "bookmark_text": "#111111",
      "tab_line": "#00aaff"
    }
  }
}