Examine source code of D.Bridge 2

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "2.0.6.0",
  "author": "DITEC, a.s.",
  "developer": {
    "name": "DITEC, a.s.",
    "url": "https://www.ditec.sk/"
  },
  "homepage_url": "https://www.ditec.sk/produkty/d_suite_eidas_klientske_aplikacie_pre_kvalifikovany_elektronicky_podpis",
  "default_locale": "en",
  "icons": {
    "16": "dbridge_16.png",
    "32": "dbridge_32.png",
    "48": "dbridge_48.png",
    "64": "dbridge_64.png",
    "96": "dbridge_96.png",
    "128": "dbridge_128.png",
    "256": "dbridge_256.png",
    "512": "dbridge_512.png"
  },
  "permissions": [
    "nativeMessaging",
    "http://*/*",
    "https://*/*",
    "file://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mozext@sk.ditec.dbridge2",
      "strict_min_version": "58.0"
    }
  }
}