Examine source code of A-Pass Browsercompanion

{
  "manifest_version": 3,
  "name": "APassCompanion",
  "version": "0.5",
  "description": "Enables APass to send Url, User & Password to browser to auto-login",
  "icons": {
    "48": "icons/icon_48x48.png",
    "96": "icons/icon_96x96.png"
  },
  "permissions": [
    "scripting",
    "nativeMessaging",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox-companion@a-pass.de",
      "strict_min_version": "110.0"
    }
  },
  "action": {
    "default_icon": "icons/icon_96x96.png"
  }
}