The new feature, called Tracking Protection, would rely on lists that users create that indicate which sites they do not want to share information with.
这项称作“追踪保护”的新功能是依赖用户创建的表单工作，这份表单指明哪些网站用户不愿分享个人信息。
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Soon after, they launched CureTogether, an online group where those with chronic pain could document and share the results of their self-tracking.
Manu Kumar, a researcher at Stanford University in California, is developing a gaze-tracking system called GUIDe aimed at a broader market: people who share documents.