Thx! And seems that `use-application-dns.net` works for me. But I will still consider replacing Firefox, because this behavior, which is inconsistent with the settings, is unacceptable to me. However, I'm glad I learned a new thing, thx again :)
Good one, and I remember that somewhere (maybe Hacker News) I saw an article said that China is spending so much money and people to do these things, build some websites and make articles to change some "views".