Smart Prevent Duplicate Tabs

Prevents AUTOMATIC creation of new tabs or repeating tabs when two or more tabs have the same addresses. The process of closing repeated tabs is automatic based on the settings that you can determine within the extension/add-on.

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manifest.json

{
  "author": "Guilherme Nascimento",
  "name": "Prevent Duplicate Tabs",
  "description": "Prevent duplicate tabs",
  "version": "0.7.10",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "16": "images/icon.png",
    "32": "images/32x.png",
    "48": "images/48x.png",
    "128": "images/128x.png"
  },
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_popup": "views/popup.html#popup"
  },
  "options_ui": {
    "page": "views/popup.html#config"
  },
  "background": {
    "scripts": [
      "js/boot.js",
      "js/background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e80594de-acca-4551-af7a-c9bd9d2f3388}"
    }
  }
}