Once you have downloaded the CryptoTab miner you are ready to go. The amount you will earn depends on various factors including the size and speed of your computer and how often you are using it.
To be frank, even though you will earn something while browsing the internet with the CryptoTab browser, it will not be a gold mine. At the same time, CryptoTab's goal is to make crypto mining available to everyone by offering a FREE platform that the average person can download and use.