Apple is sending URLs to Tencent as part of its Safe Browsing feature, which has raised concerns about user privacy. This feature is used to protect users from malicious websites, but some argue that it may compromise user data. The exact details of how Tencent's Safe Browsing works are unclear, but it is believed to use a similar method to Google's Safe Browsing API. This has led to questions about the potential for Tencent to collect user browsing data.