How do you mine Bitcoins in your web browser?

 Bitcoin needs some powerful hardware to be mined. Mining bitcoin on the browser is not possible.

But you can mine other coins that are mineable on the browser and convert into Bitcoin.

The first choice, in my opinion, is Nimiq. You can start mining in the browser in a matter of seconds here Nimiq Miner.

Another way to mine in the browser is the Cryptotab browser. You just need to download and install the browser and start mining. If you use this browser you will be mining Monero but you will be paid in bitcoin. I used this option and already ai mined about $40 in bitcoin in more than a month. They also run a referral program and most of the profits come from the referrals because mining with a normal CPU barely will pay the costs of electricity.

There is another browser mineable coin called Jsecoin. From my personal experience, this might be a scam coin because I used to mine it and use their referral program and my coins were frozen and I was unable to withdraw.