Changes

First, I was prepared for lots of problems. Only one problem I've got is that I did not follow [http://developer.mozilla.org/en/Build_Documentation instructions], so I forgot to make the installer.

Watching [http://zenit.senecac.on.ca/wiki/index.php/How_the_Build_Works the movie by Mozilla's J. Paul Reed] and following the instructions helped me to correct the error.