Examine source code of Knowledged App

{
  "manifest_version": 2,
  "name": "Knowledged App",
  "version": "1.2",
  "description": "Firefox add on for Knowledged App",
  "icons": {
    "16": "images/knowledged-logo-16.png",
    "32": "images/knowledged-logo-32.png",
    "48": "images/knowledged-logo-48.png",
    "128": "images/knowledged-logo-128.png"
  },
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://knowledged.app/ext-login-redirect",
        "*://www.knowledged.app/ext-login-redirect"
      ],
      "js": [
        "content-script.js",
        "scripts/browser-polyfill.min.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "32": "images/knowledged-logo-32.png"
    },
    "default_title": "Knowledged App",
    "default_popup": "popup.html"
  },
  "permissions": [
    "contextMenus",
    "storage",
    "identity",
    "*://www.googleapis.com/*",
    "*://accounts.google.com/*",
    "*://knowledged.app/*",
    "*://www.knowledged.app/*",
    "*://dvrujrrikimhmefjligr.supabase.co/*",
    "tabs",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ffaddon@knowledged.app",
      "strict_min_version": "60.0"
    }
  }
}