A beginner's question, many thanks!

Jinghui Niu <[email protected]> Tue, 19 Jul 2011 23:09:21 -0700 (PDT)
Newsgroups gmane.comp.mozilla.accessibility
Organization http://groups.google.com
Message-ID <d5a887bc-5d5b-4ce5-8934-232200921e14@p29g2000pre.googlegroups.com>
I'm enthusiastic about Mozilla Firefox and have a keen passion to
learn it. However, I am just a beginner programmer.
Mozilla Firefox is written in C/C++, JavaScript, CSS, XUL, XBL. Does
this mean I will have to learn all of those programming languages and
standards before I could actually make any true development on Firefox
source code? I'm currently learning JavaScript and a little bit
uncertain about my direction. So experts please advise me about the
learning curve.
I appreciate your advice. Thanks.