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<    "manifest_version": 2,
---
>    "manifest_version": 3,
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<     "scripts": ["background.js"]},
---
>     "service_worker": "background.js"},
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< my $background ='function customfunc(info)
< {
<  var searchstring = info.selectionText;
<  chrome.tabs.create({url: "'.$url.'" + searchstring})
< }
< chrome.contextMenus.create({title: "'.$descr.'", contexts:["selection"], onclick: customfunc});';
---
> my $background = 'chrome.runtime.onInstalled.addListener(function() {
>     chrome.contextMenus.create({
>         title: "'.$descr.'",
>         contexts: ["selection"],
>         id: "'.$descr.'"
>     });
> });
>
> chrome.contextMenus.onClicked.addListener(function (info, tab) {
>     if (info.menuItemId === "'.$descr.'") {
>         let getToSite = "'.$url.'" + info.selectionText
>         chrome.tabs.create({index: tab.index + 1, url: getToSite, selected: true});
>     }
> })';
>