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.
Россиянин решил растопить сердце бывшей возлюбленной и сжег ее дом08:47，更多细节参见服务器推荐
河北正定县，滹沱河艺术生态岛环境宜人，吸引市民健身。，详情可参考爱思助手下载最新版本
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