Greasy Fork is available in English.
通杀大部分网站，可以解除禁止复制、剪切、选择文本、右键菜单的限制。
False positive. I've analyzed the script and it doesn't access any external sources. You should be aware that reliability of antivirus software is very low, especially when it concerns web pages. The url shown in your screenshot is a PNG image, not a virus, and it is not accessed by the script, it's just a by-product of your browsing activity.
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Lo instalé y me empezaron a saltar muchas alertas de virus, lo desactivo o elimino y las alertas se detienen.