how do i modify the content?

[akwin1234]

lets say it returns code of a website.
i want to remove ad codes from it as example. and return to browser

where is the code , cant understand

[Bryandrr]

fork it, when its done forking, replace GitHub.com/(idfk) with github.dev/(idfk)

[akwin1234]

fork it, when its done forking, replace GitHub.com/(idfk) with github.dev/(idfk)

Thanks,. i meant i quite cant understand codes of this one. looks like highly modified :)