Too bad Radar omits pornography sites, I was curious whether they'd actually be among the top sites. FWIW, SimilarWeb [2] (which has Tiktok at #46), does include porn sites (xvideos and pornhub are #8 and #9, respectively).
Though I don't quite understand how mozilla.org could rank as #10 on Radar's sites, just below Instagram and above Youtube, Whatsapp, and Twitter.
edit: It's also interesting to compare its Top Browser rankings with analytics.usa.gov [3]. It appears that Radar's measured users are significantly more on Chrome – 55% (desktop+mobile) vs 47.6% on usa.gov sites; whereas usa.gov users are significantly more on Safari (iOS+desktop): 35.2% vs 13% on Radar. I suppose this reflects the assumption that iOS has a bigger proportion of U.S. users than it does worldwide users.
[0] https://radar.cloudflare.com/#trending-domains
[1] https://www.comscore.com/Insights/Rankings