Unique Tabs

{
    "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": "0.7",
    "background": {
        "service_worker": "service_worker.js"
    },
    "icons": {
        "16": "icon16.png",
        "48": "icon48.png",
        "128": "icon128.png"
    },
    "permissions": [
        "tabs",
        "notifications",
        "webNavigation"
    ],
    "web_accessible_resources": [
        {
            "resources": [
                "icon48.png"
            ],
            "extension_ids": [
                "cicbejncjmbkbahiicbiflndmhbcgibk"
            ]
        }
    ],
    "manifest_version": 3
}