This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
Firefox users may very well be doing that and no one will know because Google is not spying on them through their browser.
Kind of is. Part of Firefox revenue is from Google, who pays to have google as the default search engine