"People I know that work in security" is vague and non descriptive.
To be fair, you did follow it up:
> as they claim FF is always the first browser to fail in the hacker games
What are their sources? I also "know such people" and I am unaware of such claims. If one uses Kali Linux, it has Mozilla Firefox as default browser. The same for Debian (on which Kali is based upon).
The thing is, you can harden your browser after installation. The first thing I do with a browser is installing uBlock Origin and uMatrix.
To be fair, you did follow it up:
> as they claim FF is always the first browser to fail in the hacker games
What are their sources? I also "know such people" and I am unaware of such claims. If one uses Kali Linux, it has Mozilla Firefox as default browser. The same for Debian (on which Kali is based upon).
The thing is, you can harden your browser after installation. The first thing I do with a browser is installing uBlock Origin and uMatrix.