Examine source code of Securden

{
  "manifest_version": 2,
  "author": "Securden Inc.",
  "default_locale": "en",
  "name": "__MSG_Securden__",
  "description": "The most secure, web-based password management for teams of all sizes.",
  "homepage_url": "https://securden.com",
  "icons": {
    "16": "images/logo-disable16.png",
    "48": "images/logo48.png",
    "64": "images/logo64.png",
    "96": "images/logo96.png",
    "128": "images/logo128.png"
  },
  "version": "3.3.7.0",
  "browser_action": {
    "default_icon": "images/logo-disable16.png",
    "default_popup": "Securden_popup.html",
    "default_title": "Securden"
  },
  "permissions": [
    "https://*/*",
    "http://*/*",
    "activeTab",
    "tabs",
    "storage",
    "contextMenus",
    "alarms",
    "scripting",
    "privacy",
    "webNavigation"
  ],
  "content_security_policy": "default-src 'self';script-src 'self'; object-src 'self'; frame-src 'self'; style-src 'self';img-src * data: blob: filesystem:;connect-src * data: blob: filesystem:;",
  "background": {
    "scripts": [
      "js/lib/jquery.js",
      "js/Securden_recording_cs_utils.js",
      "js/Securden_utils.js",
      "js/Securden_recording_bg_utils.js",
      "js/Securden_crypto_util.js",
      "js/Securden_cache_store.js",
      "js/Securden_cache_bg_router.js",
      "js/Securden_BG.js",
      "js/lib/rrweb.min.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "js/Securden_utils.js",
        "js/Securden_recording_cs_utils.js",
        "js/accountSaveSubmission.js",
        "js/Securden_CS.js",
        "js/lib/jquery.js",
        "js/lib/jquery.tabbable.min.js",
        "js/lib/lottie.js"
      ],
      "css": [
        "css/content_script.css"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "images/logo.png",
    "images/logo16.png",
    "images/logo-disable16.png",
    "images/circle-loading.gif",
    "css/static/icons/no_accounts_found.png",
    "/html/Securden_AccountSave.html",
    "/html/Securden_AccountUpdate.html",
    "/html/Securden_AccountWorkPersonalUpdate.html",
    "/html/Securden_AccountUpdateUnified.html",
    "/html/Securden_RecordForm.html",
    "/html/Securden_IncognitoAccessRequired.html",
    "/html/Securden_RecordingOverlay.html",
    "/css/incognito-access.css",
    "/json/Success_animation.json",
    "/html/Securden_manageElement.html",
    "/html/Securden_AdvancedPasswordGen.html"
  ],
  "applications": {
    "gecko": {
      "id": "firefox-addon1@securden.com"
    }
  }
}