Highlight occurrences of the selected text

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Highlight occurrences of the selected text",
    "description": "Double click a word to highlight all its occurrences in the web page. Highlight all instances of selected expression in the web page",
    "version": "0.0.10",
    "icons": {
        "128": "images\/off.png"
    },
    "background": {
        "service_worker": "sw\/sw.js",
        "type": "module"
    },
    "action": [],
    "permissions": [
        "scripting",
        "activeTab",
        "storage"
    ],
    "web_accessible_resources": [
        {
            "resources": [
                "content\/*",
                "shared\/*"
            ],
            "matches": [
                "<all_urls>"
            ]
        }
    ],
    "optional_host_permissions": [
        "https:\/\/*\/*"
    ],
    "options_page": "options\/options.html",
    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhi+IQyjAByG++W+\/Hx5lMjuK1b0mmeuBt28DIfwoU2Oe+1f5GCCB17uJzXRGnBn38EueXoKZySANPrwx+vE6e32CvTQcG3mB0i4cMJsJLpL4ZCYr0\/Rfxx7RVzzCgFcmTdkezuzRYNuPKD14vlD9W2RxRW7G8LHHJbdFkmFqqgniaKkG0HQgj\/R\/1lkitGt0bl1LqxgvWJkgpXfir5JBQiHyFSVh2t6CMjU1\/Q5rIUZTMFHk7\/A0cqXmskiMjUSO4OPqyTdlsAxAIB4nr43xKOBQHRymUYPGI7rt\/tqvEc1RHLZCa9QZpxVaciMcGt\/7wpYfXxQND6utuMvjdghrBQIDAQAB"
}