[This website](https://2019shell1.picoctf.com/problem/32205/) has a button youcan press that will give you the flag. However, if you press it in your webbrowser, it will give you an error saying "You're not picobrowser!" and listsome text after it that depends on your OS and browser (for me, it says`Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0`,but yours will likel be different).
That string of text is known as a[User-Agent](https://en.wikipedia.org/wiki/User_agent) and it tells the serverwhat browser you're using.
To convince them that you're running pico browser, you can just change youruser-agent string. To do this, I chose to use `curl` because it easily allowsyou to control the headers. You need to run
```bashcurl --user-agent "picobrowser" "https://2019shell1.picoctf.com/problem/32205/flag"```
And then buried in the output, you'll see the flag.
