It happens in all the browsers I installed on my phone. As soon as I launch any browser, it starts redirecting. I will then have to close the redirected tab to continue. How do I deal with this pls?

I use a Gionee phone.

It could be a virus or bug. Clear cache and clear data of the app. If it continues get a paid anti virus and scan your phone. If it still continues, do a factory reset.

Clear browser data. Also, what's the browsers name so we will be aware of it?

Try brave browser and thank m later
Download
https://brave.com/obi896

flinton:
Try brave browser and thank m later
Download
https://brave.com/obi896

Pls how many open tabs does it allow at the same time.

Greatzeus:

Pls how many open tabs does it allow at the same time.

As many as possible