注释 第十四页
- 关于谷歌对现代广告屏蔽软件的限制：
https://www.forbes.com/sites/kateoflahertyuk/2019/05/30/google-just-gave-2-billion-chrome-users-a-reason-to-switch-to-firefox/ 和 https://9to5google.com/2019/05/29/chrome-ad-blocking-enterprise-manifest-v3/ - Alphabet提供给美国证监会的呈报：
https://www.sec.gov/Archives/edgar/data/1652044/000165204419000004/goog10-kq42018.htm#sB8A92C82A7085B27A37F412D2216BC6F