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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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< chrome.contextMenus.create({title: "'.$descr.'", contexts:["selection"], onclick: customfunc});';
---
>
> chrome.contextMenus.onClicked.addListener(function(info, tab) {
>     if (info.menuItemId == "'.$descr.'")
> });';
>
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< close JSCRIPT;
\ No newline at end of file
---
> close JSCRIPT;