After Douban , another social platform, Zhihu, was found to embed an imperceptible watermark on the mobile and web versions, which means that if a user takes a screenshot while logged in, Zhihu can find out the identity of the person who took the screenshot through the watermark. Zhihu users said that users can use ublock on the desktop to add static rules zhihu.com##div:last-of-type[class*=”css-”] to eliminate watermarks.
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