Examine source code of GXC Digital Sign

{
  "applications": {
    "gecko": {
      "id": "gxcdigitalsign@genexusconsulting.com",
      "strict_min_version": "58.0"
    }
  },
  "name": "GXC Digital Sign",
  "version": "1.4.3.3",
  "manifest_version": 2,
  "default_locale": "en",
  "description": "__MSG_appDescription__",
  "author": "GXC S.A.",
  "short_name": "DigitalSign",
  "icons": {
    "16": "digital-sign-16.png",
    "48": "digital-sign-48.png",
    "128": "digital-sign-128.png"
  },
  "permissions": [
    "nativeMessaging",
    "tabs",
    "https://componentes.genexusconsulting.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*digitalsign*"
      ],
      "js": [
        "content_script_start.js",
        "utils.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "*://*.genexusconsulting.com/*digitalsign*",
        "*://*.genexusconsulting.local/*digitalsign*",
        "*://*.gxc.local/*digitalsign*",
        "*://*.mgap.gub.uy/*digitalsign*",
        "*://*.mgap.red.uy/*digitalsign*",
        "*://gxc-cnotarial/*digitalsign*",
        "*://*.cajanotarial.org.uy/*digitalsign*",
        "*://*.fondodesolidaridad.edu.uy/*digitalsign*",
        "*://*.fondosolidaridad.org.uy/*digitalsign*",
        "*://*.vuce.gub.uy/*digitalsign*",
        "*://dgrdigital.gub.uy/*digitalsign*",
        "*://dgrdigitaluat.pge.red.uy/*digitalsign*",
        "*://testbe/*digitalsign*",
        "*://prodbe/*digitalsign*",
        "*://*.dgi.gub.uy/*digitalsign*",
        "*://*.godoycruz.gob.ar/*digitalsign*",
        "*://*.godoycruz.gob.ar/*digitalsign*",
        "*://*.conatel.gov.py/*digitalsign*",
        "*://*.conatel.gov.py/*digitalsign*",
        "*://*.sifi.red.uy/*digitalsign*",
        "*://grp-test.bcp.gov.py/*digitalsign*",
        "*://grp.bcp.gov.py/*digitalsign*",
        "*://fbs.es/*digitalsign*",
        "*://*.fbs.es/*digitalsign*",
        "*://*.aduanas.gub.uy/*digitalsign*",
        "*://demos.k2b.com/*digitalsign*",
        "*://*.dgr.gub.uy/*digitalsign*",
        "*://*.snig.gub.uy/*digitalsign*",
        "*://snig.gub.uy/*digitalsign*",
        "*://k2b-dev.pasteur.uy/*digitalsign*",
        "*://k2b.pasteur.uy/*digitalsign*",
        "*://*.cedia.org.ec/*digitalsign*",
        "*://*.asesp.com.uy/*digitalsign*",
        "*://*.inac.uy/*digitalsign*",
        "*://*.tca.gub.uy/*digitalsign*",
        "*://*.pl.gub.uy/*digitalsign*",
        "*://*.elinpar.com/*digitalsign*",
        "*://*.escobar.gob.ar/*digitalsign*",
        "*://*.mvotma.interno/*digitalsign*"
      ],
      "js": [
        "content_script_start_paid.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "*://*/*digitalsign*"
      ],
      "js": [
        "createDialog.js",
        "content_script_idle.js",
        "render.js",
        "visibleSignatureDialog.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "main.js"
    ]
  },
  "web_accessible_resources": [
    "content_script_start.js",
    "utils.js",
    "content_script_start_paid.js",
    "content_script_idle.js",
    "render.js",
    "createDialog.js",
    "visibleSignatureDialog.js",
    "w3.css",
    "digital_sign.css",
    "ChromeInstallerWin.png",
    "InstallerWin.png",
    "arrow_page.png",
    "digital_signature_puntero.png",
    "windows_icon.png"
  ]
}