I could resonate with him/her if I were not familiar with Mercurial. Because he/she is aiming to fix or improve Firefox, figuring out a gigantic, complicated co

I could resonate with him/her if I were not familiar with Mercurial. Because he/she is aiming to fix or improve Firefox, figuring out a gigantic, complicated code base of Firefox is directly towards his/her end goal. Meanwhile, figuring out hg feels a waste of time.