Examine source code of PD Signer Bridge

{
  "manifest_version": 3,
  "name": "PD Signer Bridge",
  "version": "0.3.2",
  "description": "Sign PDF, XML and JSON files locally using your e-imza smart card or USB token via the PD Signer desktop app.",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn57bDwFx6nF7S7J7/6xxRarI3uswXfnweC2G8An5FMsGtJDfX6b/6cfb36k1CI93Cr1bMUpphEgkqH7f+6jgQKMGmRoTMQMiODbVCL/3v6NPWThIoJJvHUgrZ3o4g9Sktr64zp5VG2v1iuB63CBnegUGi3AXJb7AAXlLYmuorREAzud9d/RiOSOmqFrr3Q9m63BE5JUQA150FwMIzJJgrULbvrVVyMtaSVoGmdnKTw3CY0XHycZU46uVReG/LVr01pc461R2AveV+i3cZsBpqSXYsuyUnIP46lW2CBS3hsa9yFObrapeyQXyodNPNpyJQ7yRKRzzRq6U2TdOcnoufQIDAQAB",
  "permissions": [
    "activeTab",
    "contextMenus",
    "downloads",
    "scripting",
    "storage",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "PD Signer",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "i18n.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "sign-button.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pd-signer@pdsigner",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "externally_connectable": {
    "matches": [
      "https://app.isgdigiline.com/*",
      "https://*.isgdigiline.com/*",
      "https://app.pdsigner.com/*",
      "https://*.pdsigner.com/*",
      "http://localhost/*",
      "http://localhost:*/*",
      "https://localhost/*",
      "https://localhost:*/*"
    ]
  }
}