[victorneo]

There are other ways to contribute to Mozilla (beyond coding) listed on http://www.mozilla.org/en-US/contribute/.

Some of their web projects have amazing documentation for new contributors, such as Kitsune's documentation: http://kitsune.readthedocs.org/

[keithpeter]

Yes, as a non-programmer, I could do things like reproduce bugs on various operating systems (e.g. GNU/Linux various flavours with nvidia cards using proprietary drivers and Intel integrated graphics). I could also help with documentation.