Clutter Free - Prevent duplicate tabs

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "2023.0319.9.1",
  "version_name": "9.1.0",
  "name": "__MSG_appName__",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4F2SzP6DZiENrpMLBLe1Iqow0IzvoPyUhTLzbHhnAgvxTFT2ENpnsw9ux32z42Gcph2RHyE7+RqCBHKhIzPRbAgO7CzGi8wezTc0N/ToTlNY2MGdS/I3UjiFZmgc49WkNpf4sM2j/Y0yK9CjdWKIKB+XR5aCsnxf9Q90sfmNmFKohi8wX9raJ0nA0hAvipwoUQk7mkZJPj0xjvxFdDLqrqH6VdwNjK6lHOFNfLKmajpI/+zcv4G15h7mLYqvt0rmzplFmgW0mcX4iBIiSL7RneVNd19cdmy/WtwNAcn9YVrRQ1LdLZH7HRx4l9kHypnI76LzZbrnaqKqitgX9vzC9QIDAQAB",
  "background": {
    "scripts": [
      "js/ext/lodash.min.js",
      "js/constants.js",
      "js/ls.js",
      "js/utils.js",
      "js/settings.js",
      "js/ext/sha256.min.js",
      "js/licenseUtils.js",
      "js/license.js",
      "js/notificationConstants.js",
      "js/notificationManager.js",
      "js/listControl.js",
      "js/aumControl.js",
      "js/tabhost.js",
      "js/workhorse.js",
      "js/bgscript.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "img/browser_action/cf16.png",
      "24": "img/browser_action/cf24.png",
      "32": "img/browser_action/cf32.png"
    },
    "default_title": "__MSG_browserButtonTitle__"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/ext/jquery-3.3.1.min.js",
        "js/ext/lodash.min.js",
        "js/constants.js",
        "js/ls.js",
        "js/utils.js",
        "js/settings.js",
        "js/listControl.js",
        "js/aumControl.js",
        "js/cf.js"
      ],
      "css": [
        "css/cf.css"
      ],
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/notificationConstants.js",
        "js/notify.js"
      ],
      "css": [
        "css/notify.css"
      ]
    }
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      }
    },
    "kbd_cmd_1": {
      "suggested_key": {
        "default": "Alt+Shift+D"
      },
      "description": "__MSG_options_keyboard_shortcuts_item_1__"
    },
    "kbd_cmd_2": {
      "description": "__MSG_options_keyboard_shortcuts_item_2__"
    },
    "kbd_cmd_3": {
      "description": "__MSG_options_keyboard_shortcuts_item_3__"
    },
    "kbd_cmd_4": {
      "suggested_key": {
        "default": "Ctrl+Shift+X"
      },
      "description": "__MSG_options_keyboard_shortcuts_item_4__"
    },
    "kbd_cmd_5": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "__MSG_options_keyboard_shortcuts_item_5__"
    }
  },
  "default_locale": "en",
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "img/cf16.png",
    "32": "img/cf32.png",
    "48": "img/cf48.png",
    "128": "img/cf128.png"
  },
  "manifest_version": 2,
  "offline_enabled": true,
  "omnibox": {
    "keyword": "cf"
  },
  "options_page": "options.html",
  "web_accessible_resources": [
    "img/*"
  ],
  "optional_permissions": [
    "identity",
    "identity.email"
  ],
  "permissions": [
    "contextMenus",
    "notifications",
    "alarms",
    "storage",
    "unlimitedStorage",
    "tabs",
    "webRequest",
    "<all_urls>"
  ],
  "short_name": "__MSG_shortName__",
  "externally_connectable": {
    "matches": [
      "https://*.oorjalabs.com/*"
    ]
  }
}