For mass TikTok registrations it’s better to think in terms of a full setup (antidetect + mobile/residential proxies + realistic warm‑up) rather than a single “magic” browser.
Right now people are getting results with Multilogin (more expensive, but one of the strongest options for fingerprints and automation), AdsPower / GoLogin (cheaper, good for managing lots of profiles), and Dolphin Anty / Octo Browser, which are focused on social networks and multi‑account setups. All of them let you create isolated browser profiles so each account looks like a separate device to TikTok, which helps reduce links between accounts and shadowbans.
The key is not to run dozens of fresh accounts from the same IP, avoid overly “robotic” scripted behavior on new accounts, and warm them up like a real user. If you share your budget and whether you need API support for automated profile creation/management, it’s easier to narrow this down to 1–2 specific browsers.