At the moment I am using the Search browser (a picture with a magnifying glass on a blue background), it does not buggy, it doesn’t lag, there are no ads, the speed is excellent, the only thing is there is no auto-translator, but the developers promised to do it by the next update. There are a lot of settings for every taste. I have a premium version, it's easy to get. Try not to regret it. Good luck.
Everything that the playmarket offers now is not the best, the quality of applications from the playmarket has dropped many times. I tried to find a replacement for Iron with the same requirements, they advise either Google, which is full of ads, or slow lagging Yandex, which was thoroughly spoiled and when installed, the performance drops by 50%, if not more. I do not recommend Yandex browser to anyone!
I use Google chrome. They have the same engines, there is less clutter in Google, and it is updated more often than Yandex. In principle, they are the same. Here, it's a matter of taste.
Depending on your browser requirements, if you need performance, interface usability and stability, then try Yandex Browser or Google Chrome. If you need anonymity online, then install DuckDuckGo, Tor or Brave. If it's hard to decide and want to see all the characteristics, I recommend that you watch this review of the best browsers for Android https://101android.ru/luchshie-brauzery-dlja-android/
It depends on what you need from the browser.
If energy efficiency, then Firefox Focus.
If you need extensions and a lot of functionality, then either regular Firefox or Yandex Browser.
If Google Chrome is used on the computer, then it will be more convenient to use it on the phone / tablet. All bookmarks / passwords are synchronized, plus you can view the tabs open on both devices.
There are also all sorts of Chinese browsers like CM Browser, but I wouldn't even look in their direction, because there may be adware viruses.
If you really want something out of the box, you can try Opera and Microsoft Edge.
You need a gadget to receive notifications from your phone, measure steps, sleep, and possibly install third-party applications. Xiaomi redmi device