Examine source code of Bring Back My Scrollbar!

{
  "manifest_version": 3,
  "name": "Bring Back My Scrollbar!",
  "version": "1.2",
  "description": "Firefox extension to bring back scrollbars to websites that disable it",
  "icons": {
    "16": "icons/bbms16.png",
    "32": "icons/bbms32.png",
    "48": "icons/bbms48.png",
    "128": "icons/bbms128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bring-back-my-scrollbar@fuerst.priv.at",
      "strict_min_version": "109.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.fuerst.priv.at/*",
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}