Examine source code of dark ethereal fox

{
  "name": "dark ethereal fox",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "real madrid white firefox theme.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0.95)",
      "tab_background_text": "rgba(53, 197, 250, 1)",
      "toolbar": "rgba(0, 0, 0, 0.26)",
      "bookmark_text": "rgba(53, 197, 250, 1)",
      "toolbar_field": "rgba(3, 3, 3, 0.5)",
      "toolbar_field_text": "rgba(240, 141, 141, 1)",
      "tab_line": "rgba(240, 141, 141, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{afa34f28-6d38-4212-bbfd-af7787c89418}"
    }
  }
}