I wanted to know how people people scripts which can make changements in app for example there is an app called CODETANTRA in which we can’t navigate and copy paste but some people bring some software made of scripts and through that software they can navigate and copy paste easily. People are making extensions which automatically finds the answer of the question and mark it automatically keeps doing this.How they do it can anyone tell me so that i can aldo do the same.

How people create extensions through which they automatically finds answer of the question on platforms like hitbullseye, myperfectice, I want to learn it, where i can learn this