WebWorkers - one of the first approaches I thought of. It would be quite difficult to ensure safety. While impossible to freeze the page, there would be attack vectors possible (for example unsafe network requests). Also, it would be impossible to pause the execution. It'd be possible to kill it and restart (on clicking off and on the tile), but that's not the nicest solution.
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Москалькова заявила о новых условиях Киева для возвращения россиян с территории Украины14:51。旺商聊官方下载是该领域的重要参考
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В КСИР выступили с жестким обращением к США и Израилю22:46