Unique Tabs

Upon opening a new tab or navigating to a new page, this extension closes any earlier, duplicate tabs in the same window.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Unique Tabs",
  "description": "Upon opening a new tab or navigating to a new page, this extension closes any earlier, duplicate tabs in the same window.",
  "version": "0.6",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs",
    "notifications",
    "webNavigation"
  ],
  "web_accessible_resources": [
    "icon48.png"
  ],
  "manifest_version": 2
}