Examine source code of Minecraft.bricks

{
  "name": "Minecraft.bricks",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "maxresdefault-1615498488.jpeg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 0.46)",
      "tab_background_text": "rgba(3, 1, 1, 1)",
      "toolbar": "rgba(0, 0, 0, 0.39)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(115, 115, 115, 0.2)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(66, 59, 59, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d091f99-5e2d-4063-ab9e-39159e682e29}"
    }
  }
}