Examine source code of Minecraft Feels

{
  "name": "Minecraft Feels",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Banner Minecraft (Versão Final - OG File).png"
    },
    "colors": {
      "frame": "rgba(232, 235, 234, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(27, 97, 23, 1)",
      "bookmark_text": "rgba(235, 235, 235, 1)",
      "toolbar_field": "rgba(10, 69, 8, 1)",
      "toolbar_field_text": "rgba(163, 163, 163, 1)",
      "tab_line": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e97d4efb-9a5d-4d09-867b-bc32ddbf95df}"
    }
  }
}