Examine source code of Demon Slayer 1920x125

{
  "name": "Demon Slayer 1920x150",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Demon Slayer.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(255, 255, 255, 0.23)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.31)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 0.47)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{56a5c9ee-0014-4055-a7fe-7ed0b724f9c4}"
    }
  }
}