Examine source code of Tessy

{
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.min.js",
        "jquery.min.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "jquery.min.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_action": {
    "default_icon": "images/48x48-disabled.png",
    "default_title": "Tessy",
    "default_popup": "popup.html"
  },
  "manifest_version": 2,
  "icons": {
    "48": "images/icon48.png"
  },
  "permissions": [
    "activeTab",
    "browsingData",
    "menus",
    "storage",
    "tabs",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "*://*/*"
  ],
  "applications": {
    "gecko": {
      "id": "tessy-browser-extension@teambox.fr",
      "strict_min_version": "58.0"
    }
  },
  "name": "Tessy",
  "description": "Extension pour TESSY, permet le clic-to-call depuis une page WEB, ainsi que depuis de nombreux logiciels partenaires.",
  "version": "20251217"
}